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Yang J, Yang L, Dong RY. Nanorod Diffusion near the Solid-Liquid Interface with Varied Wall Nonuniformity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:14110-14117. [PMID: 38937926 DOI: 10.1021/acs.langmuir.4c01570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
The complex diffusion behaviors of rod-shaped nanoparticles near the solid-liquid interface are closely related to various biological processes and technological applications. Despite recent advancements in understanding the diffusion dynamics of nanoparticles near some specific solid-liquid interfaces, systematical studies to tune the interfacial interaction or fabricating nonuniform wall to see their effects on the nanorod (NR) diffusion are still lacking. This work utilized molecular dynamics simulations to investigate the rotational and translational diffusion dynamics of a single NR near the solid-liquid interface. We constructed a patterned wall featuring adjustable nonuniformity, which was accomplished by modifying the interaction between NR and the wall, noting that the resulting nonuniformity limits both the translational and rotational diffusion of NR, evident from decreases in diffusion coefficients and exponents. By trajectory analysis, we categorized the diffusion modes of NRs near the patterned wall with varied nonuniformities into three types: Fickian diffusion, desorption-mediated flight, and in-plane diffusion. Furthermore, energy analysis based on the adsorption-desorption mechanism has demonstrated that the three diffusion states are driven by interactions between the NR and the wall, which are primarily influenced by rotational diffusion. These results could significantly deepen the understanding of anisotropic nanoparticle interfacial diffusion and would provide new insights into the transport mechanisms of nanoparticles within confined environments.
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Affiliation(s)
- Jingbin Yang
- School of Astronautics, Beihang University, Beijing 100191, China
| | - Lijun Yang
- School of Astronautics, Beihang University, Beijing 100191, China
- Aircraft and Propulsion Laboratory, Ningbo Institute of Technology, Beihang University, Ningbo 315100, China
| | - Ruo-Yu Dong
- School of Astronautics, Beihang University, Beijing 100191, China
- Aircraft and Propulsion Laboratory, Ningbo Institute of Technology, Beihang University, Ningbo 315100, China
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2
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Wang K, Jiang H, Wang Q, Wang Y. Grain Refinement Mechanisms of TiC 0.5N 0.5 Nanoparticles in Aluminum. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1214. [PMID: 36770222 PMCID: PMC9920631 DOI: 10.3390/ma16031214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/20/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
In this study, TiC0.5N0.5 nanoparticles (NPs) are shown to induce a remarkable grain refinement of aluminum at various cooling rates. The grain refinement mechanisms are systematically investigated by microstructure observation, edge-to-edge matching (E2EM) model prediction, and first-principles calculations. The experimental results suggest that as the cooling rates increase from 10 K/s to 70 K/s, a transition from intergranular to intragranular distribution of NPs occurs and the Al/TiC0.5N0.5 interface varies from incoherent to coherent. Based on the E2EM analysis combined with first-principles calculation, it is found that TiC0.5N0.5 can act as a potent nucleant for the heterogeneous nucleation of α-Al. By analyzing the NP effects on the nucleation and growth of α-Al, the grain growth restriction and nucleation promotion mechanisms are proposed to elucidate the refinement phenomena at low and high cooling conditions, respectively.
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Affiliation(s)
- Kui Wang
- National Engineering Research Center of Light Alloys, Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haiyan Jiang
- National Engineering Research Center of Light Alloys, Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qudong Wang
- National Engineering Research Center of Light Alloys, Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yingxin Wang
- National Engineering Research Center of Light Alloys, Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
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3
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Li QF, Qiu W, Xie W, Huang WY, Zhou LB, Ren YJ, Chen J, Yao MH, Xiong AH, Chen W. Influence of TiCN addition on the microstructures and mechanical properties of the AZ31 alloy. RSC Adv 2022; 12:30650-30657. [PMID: 36337939 PMCID: PMC9597589 DOI: 10.1039/d2ra05280f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/13/2022] [Indexed: 11/22/2022] Open
Abstract
The microstructure and mechanical properties of extruded AZ31 + xTiCN (x = 0, 0.4, 0.8, 1.2 wt%) were investigated, and the strengthening mechanism was discussed. X-ray diffraction and energy dispersive spectroscopy (EDS) confirmed that the Al4C3 and Al2MgC2 duplex phase particles were generated in situ by TiCN and Al particles, which act as the nucleation precursors of Mg grains during solidification. The grain size decreased and then increased with increasing TiCN addition. The yield strength (YS) and ultimate tensile strength (UTS) increased with increasing TiCN addition reaching a maximum (217.5 MPa) at 0.4 wt%, and in contrast, the elongation index (EI) continuously decreased with increasing TiCN addition.
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Affiliation(s)
- Qi-feng Li
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Wei Qiu
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Wen Xie
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Wei-ying Huang
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Li-bo Zhou
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Yan-jie Ren
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Jian Chen
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
| | - Mao-hai Yao
- Hunan Rare Earth Metal Material Research Institute, Institute of Rare Earth Light AlloysChangsha410126China
| | - Ai-hu Xiong
- Hunan Rare Earth Metal Material Research Institute, Institute of Rare Earth Light AlloysChangsha410126China
| | - Wei Chen
- School of Energy and Power Engineering, Changsha University of Science & TechnologyChangshaHunan 410114China,Key Laboratory of Energy Efficiency and Clean Utilization, The Education Department of Hunan Province, Changsha University of Science & TechnologyChangshaHunan 410114China
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4
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Modification of Precipitate Coarsening Kinetics by Intragranular Nanoparticles—A Phase Field Study. METALS 2022. [DOI: 10.3390/met12060892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Precipitate coarsening is a major mechanism responsible for the degradation in mechanical properties of many precipitation-hardened alloys at high temperatures. With recent developments in processing of nanocomposite materials, a substantial volume fraction of inert second phase ceramic nanoparticles can be introduced into the grain interiors of polycrystalline materials. These intragranular nanoparticles can have synergistic effects of impeding dislocation motion and interacting with coarsening precipitates to modify the coarsening rate. In this work, the precipitate coarsening behavior of an alloy in the presence of intragranular inert nanoparticles was studied using the phase field method. Two key measurements of coarsening kinetics, precipitate size distribution and coarsening rate, were found to be affected by the volume fraction and the size of nanoparticles. Two novel mechanisms related to geometric constraints imposed by inter-nanoparticle distance and the blockage of solute diffusion path by nanoparticle–matrix interfaces were proposed to explain the observed changes in precipitate coarsening kinetics. The simulation results in general suggest that the use of small nanoparticles with large number density is effective in slowing down the coarsening kinetics.
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Surface Tension-Driven Flow and Its Correlation with Mass Transfer during L-DED of Co-Based Powders. METALS 2022. [DOI: 10.3390/met12050842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Laser direct energy deposition (L-DED) is one of the most promising additive manufacturing methods, which has been paid more and more attention in recent years. An improved heat and mass transfer model was developed here to analyze thermal behavior, driving force, surface tension-driven flow and its correlation with dilution during L-DED of Co-based powders to a 38MnVS substrate. Thermal behavior was firstly studied for its fundamental influence on fluid flow and mass transfer. Next, the roles of capillary force and thermal capillary force were characterized using both the dimensional analysis and simulation methods, and the mechanism of surface tension-driven flow was also qualitatively investigated. Finally, flow characteristics inside the melt pool were studied in detail and their correlation with the dilution phenomenon was analyzed based on the multi-component mass transfer model. The temperature gradient was found to be much larger at the front of the melt pool, and it took about 200 ms for the melt pool to reach a quasi-steady condition. Moreover, sharp changes in the curvature of the solid/liquid boundary were observed. Surface tension was demonstrated as the main driver for fluid flow and resulted in centrally outward Marangoni flow. Capillary force contributes to the reduction of the curvature of the free surface, and thermal capillary force (Marangoni force) dominated the Marangoni convection. Alloy elements from the powders, such as Co and Ni, were added to the front part of the melt pool and mainly diluted at the upper side of the rear region near the symmetric plane of the melt pool. Fundamental results in this work provide a valuable understanding of the surface tension-driven flow and its correlation with concentration dilution during the additive manufacturing process.
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Jia Y, Song D, Zhou N, Zheng K, Fu Y, Shu D. The growth restriction effect of TiCN nanoparticles on Al-Cu-Zr alloys via ultrasonic treatment. ULTRASONICS SONOCHEMISTRY 2021; 80:105829. [PMID: 34800839 PMCID: PMC8605440 DOI: 10.1016/j.ultsonch.2021.105829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 11/04/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Ex situ and in situ synchrotron X-radiography study on Al-Cu-Zr alloys with addition of Al-5Ti-1B and TiCN nanoparticles (TiCNnp) were carried out at different cooling rates. Al-Zr alloy can be effectively refined by TiCNnp via Ultrasonic treatment as compared with Al-5Ti-1B which has Zr poisoning effect. The influence of cooling rate on the nucleation and growth of grains have been studied quantitatively. The results show that the grain size was decreased and the growth rate was increased with the increasing of cooling rate. At the same cooling rate, the grain size with addition of 0.5% TiCNnp was smaller than that with the same addition of Al-5Ti-1B. The blocking factor f of TiCNnp decreases with increasing cooling rate. Based on the free growth model, a new numerical model considering the growth restriction effect of nanoparticles was established. The growth of grain was inhibited by the combining effect of solute and nanoparticles. The growth rate of grain is reduced due to part of the solid/liquid interface coated by nanoparticles. The blocking factor f is linearly decreased with the coverage ratio ω which is proportional to the critical grain radius. The grain size decreases with increasing cooling rate and decreasing f . This study is especially beneficial for Al alloys that have poisoning phenomenon inoculated by traditional refiner.
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Affiliation(s)
- Yiwang Jia
- Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China.
| | - Dongfu Song
- Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China; National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510641, China
| | - Nan Zhou
- Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Kaihong Zheng
- Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Yanan Fu
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, CAS, Shanghai 201204, China
| | - Da Shu
- Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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7
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Hoque MIU, Chowdhury AN, Islam MT, Firoz SH, Luba U, Alowasheeir A, Rahman MM, Rehman AU, Ahmad SHA, Holze R, Hossain MSA, Rahman S, Donne SW, Kaneti YV. Fabrication of highly and poorly oxidized silver oxide/silver/tin(IV) oxide nanocomposites and their comparative anti-pathogenic properties towards hazardous food pathogens. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124896. [PMID: 33387722 DOI: 10.1016/j.jhazmat.2020.124896] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Herein, we report the fabrication of highly oxidized silver oxide/silver/tin(IV) oxide (HOSBTO or Ag3+-enriched AgO/Ag/SnO2) nanocomposite under a robust oxidative environment created with the use of concentrated nitric acid. Tin(IV) hydroxide nanofluid is added to the reaction mixture as a stabilizer for the Ag3+-enriched silver oxide in the nanocomposite. The formation of Ag nanoparticles in this nanocomposite originates from the decomposition of silver oxides during calcination at 600 °C. For comparison, poorly oxidized silver oxide/silver/tin(IV) oxide (POSBTO with formula AgO/Ag/SnO2) nanocomposite has also been prepared by following the same synthetic procedures, except for the use of concentrated nitric acid. Finally, we studied in detail the anti-pathogenic capabilities of both nanocomposites against four hazardous pathogens, including pathogenic fish bacterium (Stenotrophomonas maltophilia stain EP10), oomycete (Phytophthora cactorum strain P-25), and two different strains of pathogenic strawberry fungus, BRSP08 and BRSP09 (Collectotrichum siamense). The bioassays reveal that the as-prepared HOSBTO and POSBTO nanocomposites exhibit significant inhibitory activities against the tested pathogenic bacterium, oomycete, and fungus in a dose-dependent manner. However, the degree of dose-dependent effectiveness of the two nanocomposites against each pathogen largely varies.
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Affiliation(s)
- Md Ikram Ul Hoque
- Discipline of Chemistry, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia; Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh; Department of Chemistry, Dhaka University of Engineering & Technology, Gazipur, Gazipur 1700, Bangladesh
| | - Al-Nakib Chowdhury
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Md Tofazzal Islam
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
| | - Shakhawat H Firoz
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Ummayhanni Luba
- Department of Mathematics, Jahangirnagar University, Savar, 1342, Dhaka, Bangladesh
| | - Azhar Alowasheeir
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Md Mahbubur Rahman
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
| | - Ateeq Ur Rehman
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Syed Haseeb Ali Ahmad
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia; Center of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Rudolf Holze
- Institut für Chemie, AG Elektrochemie, Technische Universität Chemnitz, 09111 Chemnitz, Germany; Institute of Advanced Materials (IAM) & School of Energy Science and Engineering, China State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu Province, China; Saint Petersburg State University, Institute of Chemistry, St. Petersburg 199034, Russia
| | - Md Shahriar A Hossain
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia; School of Mechanical & Mining Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Saidur Rahman
- Center of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia; Research Centre for Nano-Materials and Energy Technology, School of Science and Technology (RCNMET), Sunway University, No. 5, Jalan University, 47500, Petaling Jaya, Selangor, Malaysia
| | - Scott W Donne
- Discipline of Chemistry, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Yusuf Valentino Kaneti
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
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8
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Nguyen HM, Phan CM, Pham GH, Asakuma Y, Vagnoni R, Liu S. Size-tailored microwave absorption and reaction activity of Co3O4 nanocatalysts. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.10.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Yang T, He Y, Liu X, Liu X, Peng Q, Li N, Liu J. Mapping surface morphology and phase evolution of iron sulfide nanoparticles. CrystEngComm 2021. [DOI: 10.1039/d1ce00800e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The size effect on the thermodynamic phase diagram of FexSy nanoparticles.
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Affiliation(s)
- Tao Yang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Industry-University Cooperation Base between Beijing Information S&T University and Synfuels China Technology Co. Ltd, Beijing, China
| | - Yurong He
- Beijing Advanced Innovation Center for Materials Genome Engineering, Industry-University Cooperation Base between Beijing Information S&T University and Synfuels China Technology Co. Ltd, Beijing, China
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China
| | - Xiaotong Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Industry-University Cooperation Base between Beijing Information S&T University and Synfuels China Technology Co. Ltd, Beijing, China
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China
- National Energy Center for Coal to Clean Fuels, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, P.R. China
| | - Xiulei Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Industry-University Cooperation Base between Beijing Information S&T University and Synfuels China Technology Co. Ltd, Beijing, China
| | - Qing Peng
- Physics Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
- K.A.CARE Energy Research & Innovation Center at Dhahran, Dhahran, 31261, Saudi Arabia
| | - Ning Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Industry-University Cooperation Base between Beijing Information S&T University and Synfuels China Technology Co. Ltd, Beijing, China
| | - Jinjia Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China
- National Energy Center for Coal to Clean Fuels, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, P.R. China
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Lu W, Hu Q, Zhang W, Li J. Dynamic behaviors of minor droplets and the role of bubbles in phase-separating Al Bi immiscible alloy. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Effect of microgravity on the solidification of aluminum-bismuth-tin immiscible alloys. NPJ Microgravity 2019; 5:26. [PMID: 31754626 PMCID: PMC6861255 DOI: 10.1038/s41526-019-0086-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/25/2019] [Indexed: 11/08/2022] Open
Abstract
Directional solidification experiment was carried out with Al-Bi-Sn immiscible alloy under microgravity environment onboard the Tiangong 2 space laboratory of China. Sample with a well-dispersed microstructure was obtained by properly designing the experimental scheme, the matrix shows equiaxed morphology, and there is no visible gas cavity or pinhole in the sample. In contrast, the reference samples solidified on earth show phase-segregated structure and contain some gas cavities or pinholes. The grain morphology of the terrestrial sample depends on the solidification direction, it is equiaxed when the sample ampoule was withdrawn against the gravity direction, while it is columnar when the sample ampoule was withdrawn along the gravity direction. The solidification process and affecting mechanisms of microgravity on the microstructure formation are discussed. The results indicate that the microgravity conditions can effectively diminish the convective flow of the melt and the Stokes motions of the minority phase droplets and gas bubbles, which are helpful for suppressing the occurrence of macro-segregation and preventing the formation of porosity. The results also demonstrate that the microgravity conditions favor the detachment between the melt and the wall of crucible, thus increasing the nucleation undercooling of α-Al nuclei and promoting the formation of equiaxed grain.
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12
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Novel insight into mechanism of secondary phase's morphology evolution in hypomonotectic Cu-Pb-Sn alloy during solidification. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Chen Y, Zhang Q, Chen Z, Wang L, Yao J, Kovalenko V. Study on the element segregation and Laves phase formation in the carbon nanotubes reinforced IN718 superalloy by laser cladding. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.07.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Cao C, Yao G, Jiang L, Sokoluk M, Wang X, Ciston J, Javadi A, Guan Z, De Rosa I, Xie W, Lavernia EJ, Schoenung JM, Li X. Bulk ultrafine grained/nanocrystalline metals via slow cooling. SCIENCE ADVANCES 2019; 5:eaaw2398. [PMID: 31467973 PMCID: PMC6707776 DOI: 10.1126/sciadv.aaw2398] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Cooling, nucleation, and phase growth are ubiquitous processes in nature. Effective control of nucleation and phase growth is of significance to yield refined microstructures with enhanced performance for materials. Recent studies reveal that ultrafine grained (UFG)/nanocrystalline metals exhibit extraordinary properties. However, conventional microstructure refinement methods, such as fast cooling and inoculation, have reached certain fundamental limits. It has been considered impossible to fabricate bulk UFG/nanocrystalline metals via slow cooling. Here, we report a new discovery that nanoparticles can refine metal grains to ultrafine/nanoscale by instilling a continuous nucleation and growth control mechanism during slow cooling. The bulk UFG/nanocrystalline metal with nanoparticles also reveals an unprecedented thermal stability. This method overcomes the grain refinement limits and may be extended to any other processes that involve cooling, nucleation, and phase growth for widespread applications.
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Affiliation(s)
- Chezheng Cao
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Gongcheng Yao
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Lin Jiang
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA 96297, USA
- Materials & Structural Analysis, Thermo Fisher Scientific, Hillsboro, OR 97124, USA
| | - Maximilian Sokoluk
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Xin Wang
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA 96297, USA
| | - Jim Ciston
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Abdolreza Javadi
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Zeyi Guan
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Igor De Rosa
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Weiguo Xie
- Camborne School of Mines, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK
| | - Enrique J. Lavernia
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA 96297, USA
| | - Julie M. Schoenung
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA 96297, USA
| | - Xiaochun Li
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
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15
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Li XY, Xie R, Zhang C, Chen ZH, Hu JQ, Ju XJ, Wang W, Liu Z, Chu LY. Effects of hydrophilicity of blended submicrogels on the microstructure and performance of thermo-responsive membranes. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.04.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Hojjatzadeh SMH, Parab ND, Yan W, Guo Q, Xiong L, Zhao C, Qu M, Escano LI, Xiao X, Fezzaa K, Everhart W, Sun T, Chen L. Pore elimination mechanisms during 3D printing of metals. Nat Commun 2019; 10:3088. [PMID: 31300676 PMCID: PMC6625989 DOI: 10.1038/s41467-019-10973-9] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 06/13/2019] [Indexed: 11/30/2022] Open
Abstract
Laser powder bed fusion (LPBF) is a 3D printing technology that can print metal parts with complex geometries without the design constraints of traditional manufacturing routes. However, the parts printed by LPBF normally contain many more pores than those made by conventional methods, which severely deteriorates their properties. Here, by combining in-situ high-speed high-resolution synchrotron x-ray imaging experiments and multi-physics modeling, we unveil the dynamics and mechanisms of pore motion and elimination in the LPBF process. We find that the high thermocapillary force, induced by the high temperature gradient in the laser interaction region, can rapidly eliminate pores from the melt pool during the LPBF process. The thermocapillary force driven pore elimination mechanism revealed here may guide the development of 3D printing approaches to achieve pore-free 3D printing of metals. 3D printing pore-free complex metal parts remains a challenge. Here, the authors combine in-situ imaging and simulations to show thermocapillary force can eliminate pores from the melt pool during a laser powder bed fusion process.
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Affiliation(s)
- S Mohammad H Hojjatzadeh
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.,Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Niranjan D Parab
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Wentao Yan
- Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Qilin Guo
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.,Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Lianghua Xiong
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.,Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Cang Zhao
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Minglei Qu
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.,Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Luis I Escano
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Xianghui Xiao
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Kamel Fezzaa
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Wes Everhart
- Department of Energy's Kansas City National Security Campus Managed by Honeywell FM&T, Kansas City, MO, 64147, USA
| | - Tao Sun
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
| | - Lianyi Chen
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA. .,Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
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17
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Wang Y, Liu Z, Luo F, Peng HY, Zhang SG, Xie R, Ju XJ, Wang W, Faraj Y, Chu LY. A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores for simple and rapid detection of trace lead(II) ions in water. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.01.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Jung DH, Rajendran SH, Jung JP. Effect of ZrO₂ Nanomaterials on Wettability and Interfacial Characteristics of Al-19Cu-11Si-2Sn Filler Metal for Low Temperature Al to Cu Dissimilar Brazing. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:nano8100784. [PMID: 30282941 PMCID: PMC6215161 DOI: 10.3390/nano8100784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 06/08/2023]
Abstract
Dissimilar Al 3003 and Cu tubular components were successfully brazed without interface cracking using ZrO₂ nanomaterials reinforced with Al-19Cu-11Si-2Sn filler. The filler was initially cast using an induction furnace and processed into ring form for brazing. Al-19Cu-11Si-2Sn filler with coarse CuAl₂ and Si phases (43 and 20 μm) were refined to 8 and 4 μm, respectively, after the addition of 0.1 wt. % ZrO₂ and shows significant improvement in the mechanical properties. ZrO₂ nanomaterials' induced diffusion controlled growth mechanism is found be the responsible for the refinement of CuAl₂ intermetallic and Si particles. The wettability of Al-19Cu-11Si-2Sn-0.1ZrO₂ increased to 78.17% on Cu side and 93.19% on the Al side compared from 74.8% and 89.9%, respectively. Increase in the yield strength, ultimate tensile strength, and percentage elongation were noted for the brazed joints. Microstructure of induction brazed joint with 40 kW for 6 seconds using Al-19Cu-11Si-2Sn-0.1ZrO₂ filler shows thin interfacial CuAl₂ intermetallic compound along the copper side and inter-diffusion region along the aluminum side and their respective mechanism is discussed. The tensile strength of the joints increased with increasing the nanomaterials addition and shows a base metal fracture. Analysis of fractured samples shows the effectiveness of ZrO₂ reinforced filler in crack propagation through the filler.
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Affiliation(s)
- Do-Hyun Jung
- Department of Materials Science and Engineering, University of Seoul, Seoul 02504, Korea.
| | - Sri Harini Rajendran
- Department of Materials Science and Engineering, University of Seoul, Seoul 02504, Korea.
| | - Jae-Pil Jung
- Department of Materials Science and Engineering, University of Seoul, Seoul 02504, Korea.
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19
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Liu S, Jie J, Zhang J, Wang P, Wang T, Li T, Yin G. A surface energy driven dissolution model for immiscible Cu-Fe alloy. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Zhang L, Man T, Huang M, Gao J, Zuo X, Wang E. Numerical Simulation of Droplets Behavior of Cu-Pb Immiscible Alloys Solidifying under Magnetic Field. MATERIALS (BASEL, SWITZERLAND) 2017; 10:ma10091005. [PMID: 28846655 PMCID: PMC5615660 DOI: 10.3390/ma10091005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/18/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
A model has been presented for the coarsening of the dispersed phase of liquid-liquid two-phase mixtures in Cu-Pb alloys under the effect of a high magnetic field (HMF). The numerical results show that the evolution of size distribution is the result of several factors and the diffusional growth, the collision-coagulation of the Cu-rich droplets (gravity sedimentation and Marangoni migration), and melt flow also have obvious effects on the movement of droplets and coarsening process. The effect of the HMF in the coarsening process of Cu-Pb alloy is studied in this work both by simulation and experiment. The analysis shows that the HMF leads to a decrease in the melt flow velocity, and can also lead to a decrease in the moving velocity of Cu-rich droplets. The HMF significantly reduces the coarsening rate of droplets as compared by the distribution evolutions. Finally, it is shown that droplet collision and coagulation can be dramatically retarded by the HMF. The results of the simulation are compared with the experiments performed with immiscible Cu-Pb alloys, and the discrepancy between theory and experiment is discussed.
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Affiliation(s)
- Lin Zhang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
| | - Tiannan Man
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
| | - Minghao Huang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
| | - Jianwen Gao
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
| | - Xiaowei Zuo
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
| | - Engang Wang
- Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China.
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21
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Shi K, Liu Z, Yang C, Li XY, Sun YM, Deng Y, Wang W, Ju XJ, Xie R, Chu LY. Novel Biocompatible Thermoresponsive Poly(N-vinyl Caprolactam)/Clay Nanocomposite Hydrogels with Macroporous Structure and Improved Mechanical Characteristics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21979-21990. [PMID: 28603958 DOI: 10.1021/acsami.7b04552] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Poly(N-vinyl caprolactam) (PVCL) hydrogels usually suffer from the imporous structure and poor mechanical characteristics as well as the toxicity of cross-linkers, although PVCL itself is biocompatible. In this paper, novel biocompatible thermoresponsive poly(N-vinyl caprolactam)/clay nanocomposite (PVCL-Clay) hydrogels with macroporous structure and improved mechanical characteristics are developed for the first time. The macroporosity in the hydrogel is introduced by using Pickering emulsions as templates, which contain N-vinyl caprolactam (VCL) monomer as dispersed phase and clay sheets as stabilizers at the interface. After polymerization, macropores are formed inside the hydrogels with the residual unreacted VCL droplets as templates. The three-dimensional PVCL polymer networks are cross-linked by the clay nanosheets. Due to the nanocomposite structure, the hydrogel exhibits better mechanical characteristics in comparison to the conventional PVCL hydrogels cross-linked by N,N'-methylene diacrylamide (BIS). The prepared PVCL-Clay hydrogel possesses remarkable temperature-responsive characteristics with a volume phase transition temperature (VPTT) around 35 °C, and provides a feasible platform for cell culture. With macroporous structure and good mechanical characteristics as well as flexible assembly performance, the proposed biocompatible thermoresponsive PVCL-Clay nanocomposite hydrogels are ideal material candidates for biomedical, analytical, and other applications such as entrapment of enzymes, cell culture, tissue engineering, and affinity and displacement chromatography.
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Affiliation(s)
- Kun Shi
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Zhuang Liu
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Chao Yang
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Xiao-Ying Li
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Yi-Min Sun
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University , Chengdu, Sichuan 610041, P.R. China
| | - Yi Deng
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Wei Wang
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Xiao-Jie Ju
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Rui Xie
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
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22
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Greer AL. Overview: Application of heterogeneous nucleation in grain-refining of metals. J Chem Phys 2016; 145:211704. [DOI: 10.1063/1.4968846] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A. L. Greer
- Department of Materials Science & Metallurgy, University of Cambridge, Cambridge CB3 0FS, United Kingdom
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23
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Effects of fabrication conditions on the microstructures and performances of smart gating membranes with in situ assembled nanogels as gates. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.07.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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25
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Burešová H, Procházková L, Turtos RM, Jarý V, Mihóková E, Beitlerová A, Pjatkan R, Gundacker S, Auffray E, Lecoq P, Nikl M, Čuba V. Preparation and luminescence properties of ZnO:Ga - polystyrene composite scintillator. OPTICS EXPRESS 2016; 24:15289-15298. [PMID: 27410805 DOI: 10.1364/oe.24.015289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Highly luminescent ZnO:Ga-polystyrene composite (ZnO:Ga-PS) with ultrafast subnanosecond decay was prepared by homogeneous embedding the ZnO:Ga scintillating powder into the scintillating organic matrix. The powder was prepared by photo-induced precipitation with subsequent calcination in air and Ar/H2 atmospheres. The composite was subsequently prepared by mixing the ZnO:Ga powder into the polystyrene (10 wt% fraction of ZnO:Ga) and press compacted to the 1 mm thick pellet. Luminescent spectral and kinetic characteristics of ZnO:Ga were preserved. Radioluminescence spectra corresponded purely to the ZnO:Ga scintillating phase and emission of polystyrene at 300-350 nm was absent. These features suggest the presence of non-radiative energy transfer from polystyrene host towards the ZnO:Ga scintillating phase which is confirmed by the measurement of X-ray excited scintillation decay with picosecond time resolution. It shows an ultrafast rise time below the time resolution of the experiment (18 ps) and a single-exponential decay with the decay time around 500 ps.
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26
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Park DS, Wang H, Vasheghani Farahani SK, Walker M, Bhatnagar A, Seghier D, Choi CJ, Kang JH, McConville CF. Surface passivation of semiconducting oxides by self-assembled nanoparticles. Sci Rep 2016; 6:18449. [PMID: 26757827 PMCID: PMC4725940 DOI: 10.1038/srep18449] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 11/12/2015] [Indexed: 11/13/2022] Open
Abstract
Physiochemical interactions which occur at the surfaces of oxide materials can significantly impair their performance in many device applications. As a result, surface passivation of oxide materials has been attempted via several deposition methods and with a number of different inert materials. Here, we demonstrate a novel approach to passivate the surface of a versatile semiconducting oxide, zinc oxide (ZnO), evoking a self-assembly methodology. This is achieved via thermodynamic phase transformation, to passivate the surface of ZnO thin films with BeO nanoparticles. Our unique approach involves the use of BexZn1-xO (BZO) alloy as a starting material that ultimately yields the required coverage of secondary phase BeO nanoparticles, and prevents thermally-induced lattice dissociation and defect-mediated chemisorption, which are undesirable features observed at the surface of undoped ZnO. This approach to surface passivation will allow the use of semiconducting oxides in a variety of different electronic applications, while maintaining the inherent properties of the materials.
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Affiliation(s)
- Dae-Sung Park
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Haiyuan Wang
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | | | - Marc Walker
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Akash Bhatnagar
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Djelloul Seghier
- Science Institute, University of Iceland, Dunhaga 3, Reykjavik, IS-107, Iceland
| | - Chel-Jong Choi
- School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
| | - Jie-Hun Kang
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom.,Department of Nano and Electronic Physics, Kookmin University, Seoul, 136-702, Republic of Korea
| | - Chris F McConville
- Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
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27
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Luo F, Xie R, Liu Z, Ju XJ, Wang W, Lin S, Chu LY. Smart gating membranes with in situ self-assembled responsive nanogels as functional gates. Sci Rep 2015; 5:14708. [PMID: 26434387 PMCID: PMC4592958 DOI: 10.1038/srep14708] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 09/07/2015] [Indexed: 11/09/2022] Open
Abstract
Smart gating membranes, inspired by the gating function of ion channels across cell membranes, are artificial membranes composed of non-responsive porous membrane substrates and responsive gates in the membrane pores that are able to dramatically regulate the trans-membrane transport of substances in response to environmental stimuli. Easy fabrication, high flux, significant response and strong mechanical strength are critical for the versatility of such smart gating membranes. Here we show a novel and simple strategy for one-step fabrication of smart gating membranes with three-dimensionally interconnected networks of functional gates, by self-assembling responsive nanogels on membrane pore surfaces in situ during a vapor-induced phase separation process for membrane formation. The smart gating membranes with in situ self-assembled responsive nanogels as functional gates show large flux, significant response and excellent mechanical property simultaneously. Because of the easy fabrication method as well as the concurrent enhancement of flux, response and mechanical property, the proposed smart gating membranes will expand the scope of membrane applications, and provide ever better performances in their applications.
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Affiliation(s)
- Feng Luo
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Rui Xie
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Zhuang Liu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xiao-Jie Ju
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.,State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Wei Wang
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Shuo Lin
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.,State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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