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An efficient method to engage oxide ceramics in low-temperature interfacial reactions: Microstructure evolution and kinetics behaviors based on supercooling in a transient liquid phase bonding joint

查看全文 作　　者：Jia [1]Yang;Wanqi [1,2,1]Zhao;Panpan [1]Lin;Qiuguang [1]Zhang;Xinfei [1]Zhang;Tiesong [1]Lin;Peng [1]He;Yanli [3]Zhuang 高影响力作者 机构地区：[1]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;[2]AECC Shenyang Liming Aero-Engine Co.,Ltd,Shenyang 110043,China;[3]Heilongjiang Provincial Key Laboratory of CO_(2) Resource Utilization and Energy Catalytic Materials,School of Material Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150040,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2023年第20期,共11页高影响力期刊 基　　金：supported by the National MCF Energy R&D Program(No.2019YFE03100100);National Natural Science Foundation of China(NSFC,Nos.51975150,51974101,U21A20128,52175302,and 52105332);National Strategic International Science and Technology Innovation Cooperation Key Project(No.2020YFE0205304);Natural Science Foundation of Heilongjiang Province,China(Nos.JQ2020E003 and LH2020E037);Applied Basic Research Key Project of Yunnan(No.202002AB080001-1). 摘　　要：Ductile transient liquid phase(TLP)bonding joints reinforced by multiple precipitates were produced using novel pre-sintered coatings and Au-Si fillers;therefore,the highest strength of NiTi/sapphire joints brazed at 460℃ for 30 min reached 72 MPa.The pre-sintering process improved the surface-active of sapphire by forming metastable Ti_(3)O and non-stoichiometric Al_(2)O_(3).The typical brazing seam consisted of O-rich compounds,TiSi_(2),and Ti-Ni-Si,wherein the O-rich phase featured different crystallinity depending on the oxygen content.The sapphire/seam interface was either a nanoscale diffusion region or a Si-rich amorphous layer.The breakdown of the Stokes-Einstein relation(SER)occurred,and the deviation from SER increased with a higher cooling rate.The influence of coating thickness was reflected in(i)the supercooling related to the viscosity and fractional exponent of liquids and(ii)the microstructural change of the joint related to the driving force for crystal growth.This work presented a new strategy for joining ceramics to metals at lower temperatures but using the joint at higher temperatures;furthermore,gave an insight into the microstructure evolution and kinetics behaviors based on supercooling in a transient liquid phase bonding joint. 关 键 词：Reinforced ductile fillers Transient liquid phase bonding Surface modification Kinetic behaviors
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