Carbothermal reduction reaction enhanced wettability and brazing strength of AgCuTi-SiO2f/SiO2 system
Carbothermal reduction reaction enhanced wettability and brazing strength of AgCuTi-SiO2f/SiO2 system
复制标题
碳热还原反应增强AgCuTi-SiO2f/SiO2体系的润湿性和钎焊强度
DOI：
10.1016/j.jeurceramsoc.2019.11.067
复制
发表时间：
2020
影响因子：
5.7
通讯作者：
Feng Jicai
中科院分区：
文献类型：
--
作者：
Sun Zhan;Cao Yu;Zhang Lixia;Feng Jicai
本研究采用碳热还原反应（CRR）方法对SiO 2f/SiO2复合材料的表面相结构进行了调整，使其具有高的化学反应活性，以取代原有的惰性表面。结果表明，经CRR处理后可以形成SiC。对于AgCuTi-SiO 2f/SiO2润湿界面，反应层内存在TiC和残余热解碳层，这是提高AgCuTi-SiO 2f/SiO2润湿性的关键。经CRR处理后，AgCuTi-SiO 2f/SiO2体系的接触角由127°下降到43°。通过比较AgCuTi-SiO 2f/SiO 2f原始AgCuTi-SiO 2f/SiO2系统、经CRR处理的AgCuTi-SiO 2f/SiO2系统（形成SiC）和经碳粉包覆的AgCuTi-SiO 2f/SiO2系统（无SiC形成）。经CRR处理的SiO 2f/SiO2-AgCuTi-SiO 2f/SiO2体系的剪切强度最高，是其他2种钎焊体系的3倍。
A carbothermal reduction reaction (CRR) approach was developed in this research to tailor the surface phase structure of the SiO2f/SiO2composites with high chemical reactivity to replace the original inert surface. Results show that SiC can form after CRR treatments. For AgCuTi-SiO2f/SiO2wetting interfaces, TiC and residual pyrolytic carbon layer can be found inside the reaction layer, which was the key, promoting the wettability of the AgCuTi-SiO2f/SiO2system. The contact angle of the AgCuTi-SiO2f/SiO2system dropped from 127° to 43° after the CRR treatments. The reliability of the bonded AgCuTi-SiO2f/SiO2interface was also characterized by putting 3 different systems into comparison, i.e., the original AgCuTi-SiO2f/SiO2system, the AgCuTi-SiO2f/SiO2system with CRR treatments (SiC formation) and the AgCuTi-SiO2f/SiO2system coated with powdered carbon (no SiC formation). The shear strength of the SiO2f/SiO2-AgCuTi-SiO2f/SiO2system with CRR treatments was the highest, which was 3 times that of the other 2 brazing systems.