Brazing of C/C composites and 304 stainless steels via Ni/Mo composite interlayer
In order to improve the strength of C/C composites and 304 SS brazed joint,two substrates were brazed by adding metal interlayers(Ni,Mo,Ni/Mo)to BNi-2 or AgCuTi filler metals.The objective of this study was to investigate the microstructure,joint mechanism,and mechanical properties of the brazed joints.The findings revealed that the microstructure of the BNi-2+Ni/Mo joint consisted of Cr3C2,Ni(s,s),CrxNiy+MoNi4,Mo,MoNi4+CrxMy,and Ni(s,s)+ Cr-Fe.The interfacial microstructure of the AgCuTi+Ni/Mo joint in the control experiment consisted of TiC,Ag(s,s)+ Cu(s,s),Ni,Ag(s,s)+Cu(s,s)+MoTi,Mo,and MoTi+Cu(s,s)+Ag(s,s).Finite element simulations demonstrated that the Ni/Mo composite interlayer effectively alleviated residual stresses in the C/C substrates.The average shear strength of the BNi-2+Ni/Mo brazed joints at room temperature was found to be 2.57 MPa,while the average shear strength of the AgCuTi+Ni,Mo,and Ni/Mo joints were 10.91 MPa,23.81 MPa,and 26.77 MPa,respectively.
C/C composites304 stainless steelvacuum brazingcomposite interlayerfinite element analysis
肖逸锋、张汭、胡忠淇、吴靓、张乾坤、孙妍、李淳、许志鑫
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School of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China
State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China
Design Institute of Nuclear Power Institute of China,Chengdu 610005,China
C/C复合材料 304不锈钢 真空钎焊 复合中间层 有限元分析
Hunan Provincial Department of Education,ChinaState Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,China
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