Reactions mechanism and mechanical properties of a SiCf/SiC joint affected by Cu/Ni/Ti elements and inhomogeneous composites

被引:3
|
作者
Yang, Jia [1 ]
Fu, Mengchun [1 ]
Wu, Tong [1 ]
Zhao, Yuwei [1 ]
He, Haohua [1 ]
Zhang, Qianrun [1 ]
Wang, Ce [1 ,2 ]
Lin, Panpan [1 ]
He, Peng [1 ]
Lin, Tiesong [1 ]
Mei, Han [3 ]
Liu, Yue [3 ]
机构
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Zhengzhou Res Inst, Zhengzhou 450018, Peoples R China
[3] AECC Shenyang Liming Aeroengine Co Ltd, Shenyang 110043, Peoples R China
关键词
Characterization; Shear strength; SiC f /SiC composite; CuNiTi filler; Thermodynamic calculation; SIC COMPOSITES; TI; MICROSTRUCTURE; TEMPERATURE; EVOLUTION; FIBERS; NI;
D O I
10.1016/j.jeurceramsoc.2023.10.049
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
PIP-prepared SiCf/SiC composite joints were brazed by using Cu-Ni-Ti filler alloys, composed of region I: Ni16Si7Ti6 +NiSi2/NiSi/Ni3Ti+TiCx +Cu and region II: TiCx +Cu and infiltration region. The individual and coupled reactions between Cu/Ni/Ti elements and SiCf/SiC composites were clarified experimentally and thermodynamically. The infiltration region was first confirmed to be amorphous Cu-Si-C or Si-C matrix, Cu or Cu (C), (Cu, Ni)15Si4, and Ni2Si. The joint strength was related to the carbonization and amorphization in the infiltration region and the compound content in region I. Three interfaces of vertical fiber-seam, parallel fiberseam, and matrix-seam were different because of the inhomogeneous features of SiCf/SiC composites. The crystallinity of SiC and the residual free carbon affected the reaction kinetics of the Ti element. The PyC coating produced compact TiCx grains that consequently served as a diffusion barrier for the parallel fibers. The topology of the fibers affected the infiltration region by forming a "capillary action".
引用
收藏
页码:1470 / 1481
页数:12
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