Microstructure and mechanical properties of SiC/Inconel 718 joints brazed with CoFeCu3.5Mn3.5Cr high-entropy alloy filler  

作　　者：Hong Li Bo-jin Li Yun-yue Li Tian-ran Ding Jian Qin Erika Hodúlová Yi-peng Wang 

机构地区：[1]College of Materials Science and Engineering,Beijing University of Technology,Beijing,100124,China [2]Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou,450001,Henan,China [3]Institute of Materials and Machine Mechanics,Slovak Academy of Sciences,Bratislava,84513,Slovak Republic

出　　处：《Journal of Iron and Steel Research International》2024年第10期2590-2599,共10页钢铁研究学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52074017);Beijing Natural Science Foundation(3232005);2024 BJUT Introducing Intelligence Breeding Project(2024DL01);China-CEEC Joint Education Project for Higher Education(2021113);State Key Laboratory of Advanced Brazing Filler Metals and Technology(SKLABFMT202004);State Key Laboratory of Advanced Welding and Joining(AWJ-20-M01).

摘　　要：Achieving high-quality joining of silicon carbide(SiC)ceramics and Inconel 718 alloy has become a significant challenge for the brazing process,which is strongly dependent on the filler material.A novel composite interlayer consisting of high-entropy alloys(HEAs),HEA/Ni/HEA,was proposed to reduce the formation of intermetallic compounds in the brazed joints of SiC ceramics and Inconel 718 alloy.A reliable SiC/Inconel 718 brazed joint was produced at 1120℃ for 60 min.The results showed a significant reduction in the number of NiSi compounds in the brazed joint.The brazing seam structure near SiC side was filled with face-centered cubic phases with good plasticity and soft Cu-rich phases due to the high-entropy effect,which effectively suppressed the formation of intermetallic compounds.The maximum shear strength of the brazed joint reached 88 MPa,showing excellent tensile strength.The results provide a valuable basis for improving the joint quality of SiC ceramics and metals by adding high-entropy alloy fillers.

关 键 词：High-entropy alloy SiC ceramics Inconel 718 alloy BRAZING Composite interlayer 

分 类 号：TG139[一般工业技术—材料科学与工程]