C/SiC复合陶瓷与铌合金的活性钎焊  

Study on Active Reactive Brazing of C/SiC Ceramic to Nb Alloy

作　　者：陆艳杰[1] 张小勇[1] 楚建新[1] 刘鑫[1] 方针正[1] 

机构地区：[1]北京有色金属研究总院粉末冶金及特种材料研究所,北京100088

出　　处：《稀有金属》2008年第5期636-640,共5页Chinese Journal of Rare Metals

基　　金：国家"863"计划项目(2006AA03A220)资助

摘　　要：用Ag-Cu-Ti活性钎料对C/SiC复合陶瓷与Nb合金进行了真空钎焊。结果表明,适合该陶瓷钎焊的Ag-Cu-Ti钎料的Ti含量以2.5%～3.0%(质量分数)为宜;但Ag-Cu-Ti2.5钎料直接钎焊陶瓷与金属,焊缝及陶瓷一侧有裂纹和孔洞等缺陷;钎料中引入Mo颗粒后有效缓解了残余应力,实现了陶瓷与金属的气密连接,界面反应产物主要是TiC,TiSi,Cu4Ti,Cu3Ti。The C/SiC ceramic was brazed to Nb alloy in vacuum using Ag-Cu-Ti brazing alloys. The results showed that the 2.5% -3.0%Ti （mass fraction） in brazing alloy was advisable for brazing C/SiC ceramic. However C/SiC could not be bonded reliably to Nb alloy straight using Ag-Cu-Ti2.5 because of high residual stress. In practice, the AgCuTi2.5-Mo material could joint them and the joint was highly gastight, depending on the 40% Mo （volume fraction） grains which could distinctly release the thermal stress, and the main reaction products were TiC, TiSi, Cu4Ti, Cu3Ti.

关 键 词：C/SIC 活性钎焊 残余应力 润湿性 

分 类 号：TG407[金属学及工艺—焊接]