Preparation and Mechanical Properties of C/SiC Joints with Pins or Bolts

Abstract:

C/SiC substrates and M3 bolts were prepared by precursor infiltration and pyrolysis (PIP) process firstly, then the joints with four joining methods (2 φ3mm soft pins, S-A; 2 M3 bolts, S-B; 2 φ3mm soft pins plus 8 φ1mm soft pins, S-C; 2 M3 bolts plus 8 φ1mm 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 φ1mm pins enhances the bearing ability of the joints with 3 and 6 PIP cycles about 45% and 14%, respectively.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 377-382
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.377
• Online since: December 2012
• Authors: Guang De Li, Chang Rui Zhang, Hai Feng Hu, Yu Di Zhang, Si’an Chen, Xin Bo He, Min Mei
• Keywords: Bolts, C/SiC Composite, Joint, Mechanical Property, Pins

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