摘要
采用座滴法测试了10种钎料对C/C母材的润湿性。实验结果表明:随着活性元素Ti,Cr,V含量的提高,钎料润湿性逐渐改善。在Co-Ti和Ni-Ti钎料体系中,Ti元素的存在形式对钎料润湿性影响很大,Ti以固溶体形式存在,易于向C/C母材偏聚发生反应,从而提高润湿性,且润湿界面附近的Ti和C主要以TiC形式存在。采用PdNi-Cr-V-Si-B钎料的润湿界面中,活性元素Cr和V存在于扩散反应层中,推断Cr主要以Cr23C6形式存在,而V以V2C形式存在。当Cr和V同时加入钎料中,Cr向界面反应层扩散的倾向更明显。
The wettability of ten kinds of brazing fillers on C/C composite was studied with the sessile drop method. The results showed that the wettability of the brazing fillers on C/C composites was improved with the increase of the content of active elements Ti, Cr or V. In the Co-Ti and Ni-Ti brazing fillers system, the form of the element Ti had an effect on the wettability. When the element Ti existed with solid solution, it tended to react with C/C composite to improve the wettability. The elements Ti and C reacted and formed TiC compound. The active elements Cr, V distributed at the interface between C/C composite and PdNi-Cr-V-Si-B brazing filler and formed Cr23C6 phase and V2 C phase respectively. When the elements Cr, V were added concurrently in the brazing filler, the former diffused to the reaction layer more strongly than the latter.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第1期25-29,37,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(59905022
50475160)
关键词
高温钎料
C/C复合材料
钎焊
润湿性
high-temperature brazing filler
C/C composite
brazing
wettability
