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Zhang L, Li X, Qu X, Qin M, Que Z, Wei Z, Guo C, Lu X, Dong Y. Powder Metallurgy Route to Ultrafine-Grained Refractory Metals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022:e2205807. [PMID: 36036512 DOI: 10.1002/adma.202205807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/12/2022] [Indexed: 06/15/2023]
Abstract
Ultrafine-grained (UFG) refractory metals are promising materials for applications in aerospace, microelectronics, nuclear energy, and many others under extreme environments. Powder metallurgy (PM) allows to produce such materials with well-controlled chemistry and microstructure at multiple length scales and near-net shape manufacturing. However, sintering refractory metals to full density while maintaining a fine microstructure is still challenging due to the high sintering temperature and the difficulty to separate the kinetics of densification versus grain growth. Here an overview of the sintering issues, microstructural design rules, and PM practices towards UFG and nanocrystalline refractory metals are sought to be provided. The previous efforts shall be reviewed to address the processing challenges, including the use of fine/nanopowders, second-phase grain growth inhibitors, and field-assisted sintering techniques. Recently, pressureless two-step sintering has been successfully demonstrated in producing dense UFG refractory metals down to ≈300 nm average grain size with a uniform microstructure and this technological breakthrough shall be reviewed. PM progresses in specific materials systems shall be next reviewed, including elementary metals (W and Mo), refractory alloys (W-Re), refractory high-entropy alloys, and their composites. Last, future developments and the endeavor towards UFG and nanocrystalline refractory metals with exceptionally uniform microstructure and improved properties are outlined.
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Affiliation(s)
- Lin Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xingyu Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xuanhui Qu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Mingli Qin
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zhongyou Que
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zichen Wei
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chenguang Guo
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xin Lu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yanhao Dong
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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Microstructures and properties of Cu-10Sn oil bearings reinforced by Al2O3 nanoparticles. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Amrute AP, Łodziana Z, Schreyer H, Weidenthaler C, Schüth F. Response to Comment on "High-surface-area corundum by mechanochemically induced phase transformation of boehmite". Science 2020; 368:368/6494/eabb0948. [PMID: 32467361 DOI: 10.1126/science.abb0948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/06/2020] [Indexed: 11/02/2022]
Abstract
Li et al commented that our report claims that methods reported thus far cannot enable the production of high-purity corundum with surface areas greater than 100 m2 g-1, and that our obtained material could be porous aggregates rather than nanoparticles. We disagree with both of these suggestions.
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Affiliation(s)
- Amol P Amrute
- Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany.
| | | | - Hannah Schreyer
- Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Claudia Weidenthaler
- Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Ferdi Schüth
- Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany.
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