The preparation and mechanical properties of carbon/carbon (C/C) composite and carbon fiber reinforced silicon carbide (Cf/SiC) composite joint by partial transient liquid phase (PTLP) diffusion bonding process

• Published in: Vacuum Vol. 158; pp. 113 - 116
• Main Authors: Wang, Jie, Yang, Guanzhong, Zhang, Fuqi, Xiong, Yanlin, Xiong, Qinglian
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2018
• Subjects: Carbon–carbon composites; Ceramic matrix composites; Diffusion bonding; Interface structure; Interface structure; Ceramic matrix composites; Carbon–carbon composites; Diffusion bonding
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/j.vacuum.2018.09.045

Using Ti/Ni/Ti multiple foils as interlayer, carbon/carbon (C/C) composite was bonded to carbon fiber reinforced silicon carbide (Cf/SiC) composite by partial transient liquid phase (PTLP) diffusion bonding process. The multiple gradient structures, i.e. C/C composite | Ti-C reaction layer | Ni-Ti intermetallic compound | residual Ni foil | Ni-Ti intermetallic compound | Ti-C reaction layer | Cf/SiC composite, were formed during joining process. All the interfaces are bonded well, except for some micro-pores appeared in the interface between the residual Ni layer and Ni-Ti layer. The shear strength of the joint was 44.7 ± 12.8 MPa at room temperature. The X-ray result indicates that only diffraction peaks of C, TiCx and Ni-Ti Intermetallic compound were observed, while no diffraction peaks of Si were found on the fracture surface. Thus, it could be deduced that fracture occurred in the interfacial area adjacent to C/C composite side. •PTLP diffusion bonding has been successfully used to join C/C and Cf/SiC composite using Ti/Ni/Ti foils as interlayer.•The C/C-Cf/SiC joints with multiple gradient structures were obtained by PTLP diffusion bonding.•The C/C-Cf/SiC joints can be obtained under low vacuum and low pressure.•The average shear strength of the joint can reach 44.7 MPa at room temperature due to the good interface bonding of joints.