Brazing of ZrB2–SiC–C and GH99 with AgCuTi/SiC interpenetrating network structural composite as an interlayer
Brazing of ZrB2–SiC–C and GH99 with AgCuTi/SiC interpenetrating network structural composite as an interlayer
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DOI：
10.1016/j.ceramint.2020.01.014
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
L. X. Zhang;Binggang Zhang;Z. Sun;Shaoqin Liu;M. Lei;J. Feng
中科院分区：
文献类型：
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作者：
L. X. Zhang;Binggang Zhang;Z. Sun;Shaoqin Liu;M. Lei;J. Feng
陶瓷/金属互穿网络结构已被证明对降低金属基体的热膨胀系数（CTE）具有显着效果。在我们的研究中，通过熔渗法制备了AgCuTi/SiC互穿网络结构复合材料（ASINC）。在渗透过程中，AgCuTi 填料熔化并渗透到多孔 SiC 陶瓷中。研究了AgCuTi在多孔SiC陶瓷上的润湿行为。对 ASINC 的微观结构进行了表征。将合成的 ASINC 制成中间层，以制备 ZrB2-SiC-C 陶瓷/AgCuTi/ASINC/AgCuTi/GH99 钎焊接头。研究了在 860°C 下钎焊 10 分钟的接头的典型微观结构。研究了保温时间对钎焊接头显微组织和室温剪切强度的影响。与单层AgCuTi中间层钎焊的情况相比，最大剪切强度提高了161%。详细讨论了钎焊接头的微观结构演变和机械强化机制。
Ceramic/metal interpenetrating network structure has been proved to have a significant effect on decreasing the coefficient of thermal expansion (CTE) of the metal matrix. In our study, a AgCuTi/SiC interpenetrating network structural composite (ASINC) was fabricated through a melt infiltration method. During the infiltration process, the AgCuTi filler melted and infiltrated into a porous SiC ceramic. Wetting behavior of the AgCuTi on the porous SiC ceramic was studied. Microstructure of the ASINC was characterized. The synthesized ASINC was fabricated as an interlayer to prepare a ZrB2–SiC–C ceramic/AgCuTi/ASINC/AgCuTi/GH99 brazed joint. Typical microstructure of the joint brazed at 860 °C for 10 min was investigated. The effect of holding time on the microstructure and the room-temperature shear strength of the brazed joints was studied. The maximum shear strength increased by 161% compared with the case brazed with a single AgCuTi interlayer. Microstructure evolution and mechanical strengthening mechanisms of the brazed joints were discussed in detail.