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Zhang L, Song R, Jia Y, Zou Z, Chen Y, Wang Q. Purification of Quinoline Insolubles in Heavy Coal Tar and Preparation of Meso-Carbon Microbeads by Catalytic Polycondensation. MATERIALS (BASEL, SWITZERLAND) 2023; 17:143. [PMID: 38203998 PMCID: PMC10780107 DOI: 10.3390/ma17010143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 01/12/2024]
Abstract
The quinoline-insoluble (QI) matter in coal tar and coal tar pitch is an important factor affecting the properties of subsequent carbon materials. In this paper, catalytic polycondensation was used to remove QI from heavy coal tar, and meso-carbon microbeads could be formed during the purification process. The results showed that AlCl3 had superior catalytic performance to CuCl2, and the content of QI and heavy components, including pitch, in the coal tar was lower after AlCl3 catalytic polycondensation. Under the condition of catalytic polycondensation (AlCl3 0.9 g, temperature 200 °C, and time 9 h), AlCl3 could reduce the QI content in heavy coal tar. The formed small particles could be filtered and removed, and good carbon materials could be obtained under the condition of catalytic polycondensation (AlCl3 0.9 g, temperature 260 °C, and time 3 h).
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Affiliation(s)
- Lei Zhang
- School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; (R.S.); (Z.Z.); (Y.C.); (Q.W.)
- Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an 710021, China
| | - Ruikang Song
- School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; (R.S.); (Z.Z.); (Y.C.); (Q.W.)
| | - Yang Jia
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China;
| | - Zhuorui Zou
- School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; (R.S.); (Z.Z.); (Y.C.); (Q.W.)
| | - Ya Chen
- School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; (R.S.); (Z.Z.); (Y.C.); (Q.W.)
| | - Qi Wang
- School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; (R.S.); (Z.Z.); (Y.C.); (Q.W.)
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Bao S, Yang C, Li Z, Ye P, Chen Y. Microstructure and Air Trace Defects of the Rapidly Solidified ZK60 Magnesium Alloy Ribbon. MATERIALS (BASEL, SWITZERLAND) 2023; 17:30. [PMID: 38203884 PMCID: PMC10779538 DOI: 10.3390/ma17010030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 01/12/2024]
Abstract
ZK60 alloy metal ribbons were prepared successfully in a carbon dioxide atmosphere by varying the speeds of melt spinning. The thin metal ribbon with different solidification speeds was prepared by controlling different rotation speeds, and the influence of solidification speed on the ZK60 ribbon was studied. The results show that the gas mark has a significant effect on the local structure of the ribbon. The gas mark's proportional area of the ZK60 ribbon increases first and then decreases with the increase in roll speed, and the gas mark proportion area is the smallest at 17.6 m/s. With the increase in the solidification rate, the base texture of the ribbon is enhanced, and the proportion of columnar crystals in the ribbon gradually increases. At the rate of 17.6 m/s, columnar crystals run through the entire side of the ribbon, and uniformly distributed spherical-particle phases are found inside the grain. At the speed of 17.6 m/s, the mechanical properties of different areas of the ribbon are close and different from those of the other two speeds, and the performance of the quenching zone is better than that of the slow-cooling zone.
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Affiliation(s)
- Shuai Bao
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; (S.B.); (C.Y.); (Z.L.); (P.Y.)
- School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Chao Yang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; (S.B.); (C.Y.); (Z.L.); (P.Y.)
- School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Zhenshuai Li
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; (S.B.); (C.Y.); (Z.L.); (P.Y.)
- School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Peiran Ye
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; (S.B.); (C.Y.); (Z.L.); (P.Y.)
- School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Yungui Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; (S.B.); (C.Y.); (Z.L.); (P.Y.)
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Chengdu 610065, China
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Wang Q, Fang M, Min X, Du P, Huang Z, Liu Y, Wu X, Liu Y, Liu C, Huang F. Preparation and Performance of Ferric-Rich Bauxite-Tailing-Based Thermal Storage Ceramics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6900. [PMID: 37959497 PMCID: PMC10650323 DOI: 10.3390/ma16216900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023]
Abstract
In recent years, regenerative thermal oxidizer (RTO) has been widely used in the petroleum industry, chemical industry, etc. The massive storage required by solid waste has become a serious problem. Due to their chemical composition, bauxite tailings as raw materials for high-temperature thermal storage ceramics show enormous potential in the fields of research and application. In this study, we propose a method for preparing ferric-rich and high specific storage capacity by adding Fe2O3 powder to bauxite tailings. Based on a 7:3 mass ratio of bauxite tailings to lepidolite, Fe2O3 powder with different mass fractions (7 wt%, 15 wt%, 20 wt%, 30 wt%, and 40 wt%) was added to the ceramic material to improve the physical properties and thermal storage capacity of thermal storage ceramics. The results showed that ferric-rich thermal storage ceramics with optimal performance were obtained by holding them at a sintering temperature of 1000 °C for 2 h. When the Fe2O3 content was 15 wt%, the bulk density of the thermal storage ceramic reached 2.53 g/cm3, the compressive strength was 120.81 MPa, and the specific heat capacity was 1.06 J/(g·K). This study has practical guidance significance in the preparation of high thermal storage ceramics at low temperatures and low costs.
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Affiliation(s)
- Qi Wang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Minghao Fang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Xin Min
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Pengpeng Du
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Zhaohui Huang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Yangai Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Xiaowen Wu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (Q.W.); (X.M.); (P.D.); (Z.H.); (Y.L.); (X.W.)
| | - Yulin Liu
- Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China; (Y.L.); (C.L.)
| | - Changmiao Liu
- Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Zhengzhou 450006, China; (Y.L.); (C.L.)
| | - Feihui Huang
- Shandong Aofu Environmental Technology Co., Ltd., Dezhou 251599, China;
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Zhao Y, Wang R, Zhang J, Farid MI, Wu W, Yu T. Evolution of CrC x Ceramic Induced by Laser Direct Energy Deposition Multilayered Gradient Ni204-dr60 Coating. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6865. [PMID: 37959463 PMCID: PMC10650887 DOI: 10.3390/ma16216865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/07/2023] [Accepted: 10/19/2023] [Indexed: 11/15/2023]
Abstract
The manufacturing process for many large components of machines leads to a difference in their properties and performances based on changes in location. Functionally graded materials can meet these requirements and address the issue of generation and expansion of interface cracks. Ni204-dr60 gradient coatings were successfully fabricated using laser direct energy deposition (LDED). Microstructure mechanism evolution and microhardness of the gradient coating were comprehensively investigated. The change in the precipitated phase at the grain boundary and the intergranular zones resulted in a change in microstructural characteristics and also affected the microhardness distribution. The reinforced phase of the Ni204 → dr60 gradient zone from Ni204 to dr60 gradually precipitated and was rich in Mo and Nb phase, lath-shaped CrCx phase, network-shaped CrCx phase, block shape (Ni, Si) (C, B) phase, block CrCx phase, and block Cr (B, C) phase. The gradient coating thus acts as a potential candidate to effectively solve the problem of crack generation at the interface of dr60 and the substrate.
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Affiliation(s)
- Yu Zhao
- School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China; (Y.Z.); (R.W.); (J.Z.); (M.I.F.)
- Chongqing Research Institute, Jilin University, Chongqing 401133, China
| | - Ruobing Wang
- School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China; (Y.Z.); (R.W.); (J.Z.); (M.I.F.)
| | - Jian Zhang
- School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China; (Y.Z.); (R.W.); (J.Z.); (M.I.F.)
| | - Muhammad Imran Farid
- School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China; (Y.Z.); (R.W.); (J.Z.); (M.I.F.)
| | - Wenzheng Wu
- School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China; (Y.Z.); (R.W.); (J.Z.); (M.I.F.)
- Chongqing Research Institute, Jilin University, Chongqing 401133, China
| | - Tianbiao Yu
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
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Jiao J, Sun S, Xu Z, Wang J, Sheng L, Gao J. Fabricating Inner Channels in Laser Additive Manufacturing Process via Thin-Plate-Preplacing Method. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6406. [PMID: 37834543 PMCID: PMC10573681 DOI: 10.3390/ma16196406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023]
Abstract
This paper presents a hybrid manufacturing process for the preparation of complex cavity structure parts with high surface quality. Firstly, laser precision packaging technology is utilized to accurately connect a thin plate to a substrate with microchannel. Secondly, Direct Metal Laser-Sintering (DMLS) technology is utilized to completely shape the part. The morphology and microstructure of laser encapsulated specimens and DMLS molded parts were investigated. The results show that the thin plate and the substrate can form a good metallurgical bond. The lowest surface roughness of the DMLS molded parts was 1.18 μm. The perpendicularity between the top of the microchannel and the side wall was optimal when the laser power was 240 W. Consequently, the hybrid manufacturing process effectively solves the problems of poor surface quality and powder sticking of closed inner cavities. The method effectively eliminates the defects of adhesive powder in the inner cavity of the DMLS microchannel, improves the finish, and solves the problem that mechanical tools cannot be processed inside the microchannel, which lays the foundation for the research of DMLS high-quality microchannel process.
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Affiliation(s)
- Junke Jiao
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China; (S.S.); (J.W.); (J.G.)
| | - Shengyuan Sun
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China; (S.S.); (J.W.); (J.G.)
| | - Zifa Xu
- Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
| | - Jiale Wang
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China; (S.S.); (J.W.); (J.G.)
| | - Liyuan Sheng
- PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China
| | - Jicheng Gao
- School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China; (S.S.); (J.W.); (J.G.)
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