Effect of brazing temperature on microstructure and mechanical properties of 2D C-f/SiC and Nb joints brazed with Co-Ti-Nb filler alloy
Effect of brazing temperature on microstructure and mechanical properties of 2D C-f/SiC and Nb joints brazed with Co-Ti-Nb filler alloy
复制标题
钎焊温度对 Co-Ti-Nb 钎料钎焊二维 C-f/SiC 和 Nb 接头显微组织和力学性能的影响
DOI：
10.1016/j.msea.2015.03.013
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发表时间：
2015
期刊：
影响因子：
6.4
通讯作者：
Xuan Yinhua
中科院分区：
文献类型：
--
作者：
Zhang Jie;Zhang Qiang;Liu Chunfeng;Wang Guochao;Xuan Yinhua
制备了一种新型高温填充合金Co42.5Ti42.5Nb15 (at%)，该合金在1553 ~ 1613 K下加热10 min，成功地获得了Cf/ SiC-Nb接头。研究了钎焊温度对接头组织和力学性能的影响。结果表明：典型的Cf/SiC和Nb接头由Cf/SiC复合材料/(Ti,Nb)C反应层/(Ti,Nb)2Co层/Nb[Ti，Co]+(Ti,Nb)Co共晶和一些CoNb4Si化合物/Nb衬底组成。随着钎焊温度的升高，反应层厚度和钎焊层中CoNb4Si含量均增加，而钎焊层厚度减小。在1593 K时，钎焊的抗剪强度峰值为187 MPa。
A novel high-temperature filler alloy, Co42.5Ti42.5Nb15 (at%) developed with which Cf/SiC–Nb joints were successfully obtained at 1553–1613 K for 10 min. The effects of brazing temperature on the microstructure and mechanical properties of the joints were investigated. The results show that the typical Cf/SiC and Nb joint consist of Cf/SiC composite/(Ti,Nb)C reaction layer/(Ti,Nb)2Co layer/Nb[Ti,Co]+(Ti,Nb)Co eutectics with some CoNb4Si compounds/Nb substrates. With increasing the brazing temperature, both the thickness of the reaction layers and the content of CoNb4Si in the brazing layer increased, whereas the thickness of the brazing layer reduced. The shear strength presented a peak value of 187 MPa from a brazed at 1593 K.