Air-brazed Al2O3 joint with a novel bismuth glass |
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| Affiliation: | 1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, 710072, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;1. Flemish Institute for Technological Research – VITO, Boeretang 200, B-2400 Mol, Belgium;2. Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 2V4, Canada;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Department of Mechanical Engineering, College of Engineering, University of Kentucky, Lexington, KY 40506, USA;3. Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;2. Beijing Institute of Control Engineering, Beijing, 100080, China;3. State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou, 450001, China;4. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang, 621999, China;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Shandong Provincial Key Lab of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China |
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| Abstract: | Polycrystalline alumina ceramics were air-brazed using bismuth glass with a chemical composition of 50Bi2O3–40B2O3–10ZnO (mol.%) at a relatively low temperature. ZnAl2O4 particles were formed insitu in the joints and the particles grew rapidly with an increase in joining temperature and holding time increasing. In addition, penetration of the alumina substrate by the glass became increasingly serious at higher temperatures and holding durations. The mechanical properties of the joints were investigated and the maximum shear strength was determined to be 50 MPa when brazed at 650 °C for 0 min. |
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| Keywords: | Brazing Joining Joint Glass |
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