采用Ag-Cu-In-Ti钎料真空钎焊SiO_(2f)/SiO_2复合陶瓷与铌  

Joining of SiO_(2r)/SiO_2 composite to Nb using Ag-Cu-In-Ti brazing filler

作　　者：陈波[1] 吴世彪[1] 熊华平[1] 李文文[1] 

机构地区：[1]北京航空材料研究院焊接与塑性成形研究所,北京100095

出　　处：《焊接学报》2016年第4期47-51,131,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(5990522;50475160;51275497;5140105004)

摘　　要：设计了Ag-（15~26）Cu-（13~20）In-（3.1~6.9）Ti活性钎料,分别在780℃/20 min,780℃/40 min和800℃/10 min三种参数下实现了SiO_（2f）/SiO_2复合材料与铌的连接,分析了接头微观组织,测试了接头室温抗剪强度.其中800℃/10 min钎焊参数下的接头平均抗剪强度最高,达到21.6 MPa;微观分析结果表明,接头中靠近SiO_（2f）/SiO_2母材界面处形成了厚度约为2μm的连续扩散反应层,靠近铌的界面钎料与母材也形成了良好的结合.该钎焊参数下接头界面物相依次为：SiO_（2f）/SiO_2→TiO＋TiSi_2→TiO＋Cu_3Ti→Ag（s,s）＋Ag_3In＋Cu（s,s）→Nb.A novel Ag-(15~26) Cu-(13-20) In-(3.1~6.9)Ti active filler alloy was designed for joining of SiO_(2f)/SiO_2 composite to Nb at 780 ℃ for 20 min,780 ℃ for 40 min and 800 ℃ for 10 min,respectively.The joints brazed with the filler alloy at 800 ℃ for 10 min presented the maximum average shear strength of 21.6 MPa.During the brazing process,the active element Ti diffused significantly from the Ag-Cu-In-Ti alloy to the surface of the SiO_(2f)/SiO_2 composite and a thin reaction layer with a thickness of 2 μm was formed close to the composite.Sound interface was also obtained between the filler alloy and Nb.The interface structure of the joint brazed with Ag-(15~26)Cu-(13-20)In-(3.1-6.9)Ti alloy can be described as the following sequence;SiO_(2f)/SiO_2→TiO+TiSi_2→TiO+Cu_3Ti→Ag(s,s)+Ag_3In+Cu(s,s)→Nb.

关 键 词：SiO_(2f)/SiO_2复合材料 铌 钎焊 界面反应层 抗剪强度 

分 类 号：TG454[金属学及工艺—焊接]