C/C复合材料与高温合金钎焊接头微观组织与性能分析  

Microstructure and Property Analysis of the Vacuum Brazed Carbon-Carbon Composites and High Temperature Alloys Joint

作　　者：吴永智[1] 李海刚[1] 宁立芹[1] 毛建英[1] 毕建勋[1] 

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2015年第1期69-72,共4页Aerospace Materials & Technology

摘　　要：采用BNi68Cr WB粉末作为连接材料,利用真空钎焊工艺成功制备了C/C复合材料与镍基高温合金(GH600)的连接试样。并借助扫描电子显微镜和材料万能试验机,研究钎焊接头微观组织结构和室温及高温(700℃)下的抗剪切性能。结果表明,使用BNi68Cr WB粉末可以实现C/C与GH600的钎焊连接,接头的断裂位置为C/C复合材料母材;与室温条件相比,钎焊接头在700℃下的抗剪强度较低。Joining samples of carbon/carbon composites （GI-I600） were fabricated by vacuum brazing with the powder （C/C composites） and Ni based high temperature alloy of BNi68CrWB as the interlayer material. The mechani- cal properties and microstructure of the joints between C/C composite and GH600 were investigated by scanning elec- tron microscopes and universal material testing machines. The results show that the joining of C/C composites to Ni based high temperature alloy is successfully achieved by vacuum brazing process. The fracture of the joint occurs in the C/C composites. The shear strength at high temperature of the brazed joints rapidly decreases above 700℃.

关 键 词：C/C复合材料 高温合金 钎焊 

分 类 号：TG407[金属学及工艺—焊接]