AgCuTi钎焊炭/炭复合材料的组织结构  

Joining of carbon/carbon composite using AgCuTi braze

作　　者：杨凌云[1] 易茂中[1] 冉丽萍[1] 葛毅成[1] 彭可[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2015年第5期765-770,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重大工程项目相关基础研究(GFZX010204020201B6)

摘　　要：采用Ag-Cu-Ti钎料连接C/C复合材料,用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)等分析连接层的微观结构与相组成,并测试连接层的剪切强度。结果表明:C/C复合材料连接层的剪切强度跟连接温度与保温时间有关;在850℃、保温30 min条件下获得的连接层剪切强度最高,达到26.7 MPa;同时连接层与基体材料形成机械嵌合,界面发生元素扩散和冶金反应。钎焊连接层形成固溶体和化合物,包括Ag(s.s)、Cu(s.s)、Cu4Ti3和TiC。剪切断口形貌表明钎焊层与C/C坯体之间结合较好,具有一定的连接强度。C/C composites were joined using AgCuTi brazing alloy. The microstmcture, elemental diffusion and phase composition of the joint interlayer were investigated by scanning electron microscopy （SEM） ,energy dispersive spectrometer （EDS） and x-ray diffractometer （XRD）, respectively. The results show that the shear strength of C/C joints is affected observably by joining temperature and holding time. The optimum process is at 850℃ for 30 min, achieving the maximum joint shear strength of 26.7MPa. Element interdiffusions and chemical reactions take place in the joining zone, resulting in formation of various solid solutions and compounds including Ag（s.s）, Cu（s.s）, Cu4Ti3 and TiC. The shear morphology indicates that the interface and C/C matrix are in strong joints.

关 键 词：炭/炭复合材料 AgCuTi 钎焊连接 组织结构 

分 类 号：TB332[一般工业技术—材料科学与工程]