Abstract: The interfacial structure and shear strength of W/Ni/Kovar joint were studied by means of vacuum diffusion bonding with Ni foil as the interlayer material. The effect of welding temperature on the interface structure and shear strength of W/Ni/Kovar joint was studied. The results show that W/Ni/Kovar joint samples can be successfully prepared by vacuum diffusion bonding process in the range of 520 ℃ to 1 000 ℃. The thickness of diffusion layer between Kovar/Ni interfaces and Ni/W interfaces increased gradually with the increase of welding temperature, while the shear strength of the joint increased first and then decreased. When the temperature was 800 ℃, the shear strength of the joint sample was up to 182 MPa. At this time, the shear fracture of W block mainly occurred in the joint sample.
通讯作者:
*史忠旗,西安交通大学材料科学与工程学院教授、博士研究生导师。2009年于西安交通大学材料科学与工程专业博士毕业,之后在西安交通大学材料科学与工程学院工作至今。目前主要从事结构/功能一体化陶瓷材料等方面的研究。发表论文160余篇,包括Nano Energy、Advanced Science、Carbon、Composites Science and Technology、Journal of the European Ceramic Society、Journal of Advanced Ceramics、Journal of Materials Science & Technology、《硅酸盐学报》等。zhongqishi@mail.xjtu.edu.cn
仵金玲, 刘思雨, 张彪, 魏智磊, 史忠旗. 连接温度对W/Ni/Kovar真空扩散连接接头界面结构及结合强度的影响[J]. 材料导报, 2024, 38(4): 22090302-6.
WU Jinling, LIU Siyu, ZHANG Biao, WEI Zhilei, SHI Zhongqi. Effect of Welding Temperature on the Interface Microstructure and Bonding Strength of W/Ni/Kovar Joint by Vacuum Diffusion Welding. Materials Reports, 2024, 38(4): 22090302-6.
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