QIN Gang ^{1, 2}, ZOU Shunrui ², JIANG Longfei ^{1, 2,} XU Jie ², SHAN Xu ², LIU Yihe ², LI Mian ², HU Fang ¹, ZHOU Xiaobing ², HUANG Qing ²
(1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China; 2. Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China)

Abstract: SiC fiber reinforced SiC ceramic composite (SiC_f/SiC) has been considered as promising candidate of structural materials for aerospace and nuclear applications, since it has superior high temperature mechanical properties, as well as excellent oxidation, corrosion, and irradiation resistance at high temperature. SiC_f/SiCcontains SiC fiber, SiC ceramic matrix, and interface between fiber and matrixon the view point of the microstructure. The development of high-strength, near-stoichiometric, low-oxygen content silicon carbide fibers is key to obtaining silicon carbide fiber-reinforced silicon carbide ceramic matrix composites that are resistant to high temperatures, oxidation, and radiation. The crack carbon/carbon-silicon carbide multilayer composite interface has good application prospects in the aerospace field, and the new RE₃Si₂C₂ coating has potential advantages in high-temperature oxidation resistance. The ternary layered transition metal carbide interface layer may be one of the candidate schemes for preparing SiC_f/SiC composites for nuclear applications in the future. The preparation processes of SiC_f/SiC composites have their own advantages and disadvantages, and different preparation processes can be selected for different application environments. The combination of multiple preparation processes has significant advantages in preparing highly dense and thermally conductive composites. In addition, it is extremely difficult to fabricate SiC_f/SiCcomposites with large size and complex shape. Therefore, the application of SiC_f/SiC is highly dependent on a reliable joining method to assemble different simple-shaped pieces into large complex components. The research progress in SiC fiber interface, and the preparation method of SiC_f/SiCcomposites, as well as their joining technology, will be generally reviewed to provide reference for the peer scientists and engineers in this research field.
Key words: SiC; fiber; SiC fiber reinforced SiC composite; interface; joining