硅酸盐学报2013，Vol.41Issue(3)：298-303,6.DOI:10.7521/j.issn.0454-5648.2013.03.04
Ti-Ni钎料钎焊连接ZrC-SiC复合陶瓷接头的界面组织
Microstructure of ZrC-SiC Composite Ceramic Joint Vacuum Brazed with Ti-Ni Filler Metal
摘要
Abstract
ZrC-20% (volume fraction) SiC(ZS) composite ceramic was brazed with a Ti-Ni high melting point filler metal. The effect of change in filler metal composition on the interface microstructure and mechanical property was investigated. At last, the interfacial reaction rate was controlled via the change of the filler metal composition. The effect of Ni content in filler metal on the interface microstructure and mechanical property was investigated. The results showed that the interfacial reaction was violent when ZS was brazed with Ti-83% (mole fraction) Ni filler metal, and a transition layer of 50μm was formed. In this transition layer, some reactions occurred in Ni-SiC system and the reacted products were Ni2Si and C. When the content of Ni in Ti-Ni filler metal decreased to 61%, Ni reacted firstly with SiC. Also, Ti reacted with the reaction product C, and a large amount of TiC formed in the transition layer as well as the interface. The formed TiC hindered the transport of Ni atoms to the ZS composite ceramic, thus causing the reduction of the interfacial reaction. In this condition, the thickness of the transition layer decreased to 10-15μm. Furthermore, only TiC formed on the interface when brazed with Ti-50%Ni filler metal. The thickness of TiC layer was 5μm. The shear strength of the joint brazed with Ti-61%Ni filler metal reached 127MPa, which was the maximum value for its relative uniform microstructure on the interface.关键词
碳化锆/碳化硅/复合陶瓷/钎焊/抗剪强度Key words
zirconium carbide/ silicon carbide/ composite ceramic/ brazing/ shear strength分类
矿业与冶金引用本文复制引用
宋昌宝,林铁松,何鹏,魏红梅,贾德昌..Ti-Ni钎料钎焊连接ZrC-SiC复合陶瓷接头的界面组织[J].硅酸盐学报,2013,41(3):298-303,6.基金项目
国家自然科学基金(50975062,51275135,51021002)资助项目. （50975062,51275135,51021002）
