An effective approach for bonding of TZM and Nb-Zr system:Microstructure evolution,mechanical properties,and bonding mechanism  

作　　者：Z.W.Yang J.M.Lin J.F.Zhang Q.W.Qiu Y.Wang D.P.Wang J.Song 

机构地区：[1]Tianjin Key Lab of Advanced Joining Technology,School of Materials Science and Engineering,Tianjin University,Tianjin,300072,China [2]Department of Mining and Materials Engineering,McGill University,Montréal,Québec,H3A 0C5,Canada

出　　处：《Journal of Materials Science & Technology》2021年第25期16-26,共11页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51875400);the Natural Sciences and Engineering Research Council of Canada(NSERC)Discovery grant(RGPIN-2017-05187);the China Scholarship Council(CSC)。

摘　　要：A novel method of liquid metallic film(LMF)bonding was developed to join titanium zirconium molybdenum alloy(TZM)and Nb-Zr alloy with a Ni interlayer.Using this method,a Ni-Zr liquid phase was formed by the eutectic reaction and then squeezed out from the gap due to a transient pressure,leaving an LMF.It not only achieved a reliable metallurgical bonding but also served as a transition layer between TZM and Nb-Zr alloy to reduce the mismatch between them thus further improving its performance.The bonding mechanism of the TZM and Nb-Zr system was discussed based on theoretical calculation and high-resolution microscopy analysis.The advantages of this method were established by comparing the microstructure and mechanical properties of LMF bonded joints with that of traditional contact-reaction brazing and direct diffusion bonding.Additionally,the feasibility of the LMF bonding method was also demonstrated by the reliable joining of other high-temperature and immiscible systems.

关 键 词：BONDING Titanium zirconium molybdenum alloy(TZM) DIFFUSION Microstructure Mechanical properties 

分 类 号：TG146.23[一般工业技术—材料科学与工程]