Preparation and mechanical properties of C/SiC joints with pins or bolts
C/SiC substrates and M3 bolts were prepared by precursor infiltration and pyrolysis (PIP) process firstly,then the joints with four joining methods (2 (ψ)3mm soft pins,S-A; 2 M3 bolts,S-B; 2 (ψ)3mm soft pins plus 8 (ψ)1mm soft pins,S-C; 2 M3 bolts plus 8 (ψ)1mm soft pins,S-D) were assembled,finally several PIP cycles were continued to finish densification.The influences of different joining methods and PIP cycles (3 or 6) on the stripping properties of C/SiC joints were investigated,and the fracture modes were analyzed.The stripping loads of the joints adopting 6 PIP cycles are almost two to six times the values adopting 3 PIP cycles,and the corresponding fracture modes are pins or bolts rupture and pull-out,respectively.When adopting 3 PIP cycles,the bearing ability of the joints with bolts (S-B and S-D) is about 51% higher than that of joints with pins (S-A and S-C),but when adopting 6 PIP cycles,the values with pins (S-A and S-C) is about 67% higher than that with bolts (S-B and S-D).Besides,the introduction of (ψ)1mm pins enhances the bearing ability of the joints with 3 and 6 PIP cycles about 45% and 14%,respectively.
C/SiC composite Joints Pins Bolts Mechanical properties
Guangde Li Changrui Zhang Haifeng Hu Yudi Zhang Sian Chen Xinbo He Min Mei
National Key Laboratory of Science and Technology on Advanced Ceramic Fibers and Composites,College School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 1
国际会议
广州
英文
377-382
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）