Fusion welding of refractory metals and ZrB2-SiC-ZrC ceramics |
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| Affiliation: | 1. Materials Science and Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA;2. Kansas City National Security Campus, Kansas City, MO 64147, USA;1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;2. Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong, China;1. Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, PR China;2. Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, PR China;1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, PR China;4. School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, PR China;1. School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China;2. College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, China;1. State Key laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, China;1. NPU-SAS Joint Research Center and NPU-QMUL Joint Research Institute, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;3. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Molybdenum and a molybdenum alloy were fusion welded to ZrB2-based ceramics to determine if the electrical and thermal properties of the metals and ceramics affected their weldability. Commercial ceramic powders were hot pressed, machined into coupons, and preheated to 1600 °C before joining the ceramics to commercial metals using plasma arc welding. Weldability varied as indicated by the range of porosity observed within the fusion zones. Measured thermal and electrical properties appeared to have little to no effect on the weldability of metal-ceramic welds despite the large range of values measured across each property. Differences in melting temperatures between metal and ceramic coupons did affect weldability by changing the weld penetration depth into ceramic coupons. Future studies on metal-ceramic welds are suggested to investigate the effect that work function, melt viscosity, wetting, or other properties have on weldability. |
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| Keywords: | Joints/joining Ultra-high temperature ceramics Borides Carbides Refractory metals |
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