NITE工艺制备SiCf/SiC复合材料的研究进展

NITE(nano-infiltration and transient eutectic)工艺作为一种制备碳化硅纤维增强碳化硅基(SiCf/SiC)复合材料的新方法,具备周期短、工艺简单、生产成本低等优点,制备出的复合材料基体致密、孔隙率低、不含残余硅,适用于1400℃及以上高温长时服役环境应用。目前,日本、美国等国家基于其成熟的第三代碳化硅纤维,对该技术开展了较为深入的研究,并在核能工业热交换器、航空发动机燃烧室衬套等领域进行了应用验证。本文针对NITE工艺从基本概念、工艺流程、制备的SiCf/SiC复合材料和构件考核验证及前景展望四方面进行综合阐述,以期为国内该工艺的发展及应用提供一定程度的参考。

Research progress on NITE process for fabricating SiC_f/SiC composites

Nano-infiltration and transient eutectic (NITE) process is a new method for fabricating silicon carbide fiber reinforced silicon carbide based (SiC f/SiC) composites, which has the advantages of short production cycle, simple process and low production cost. The material made by NITE process is with compact matrix, low porosity, and free of residual silicon, therefore, it is suitable for high temperature and long service environments at 1400℃ and above. At present, Japan, the United States and other countries have carried out in-depth research on this technology based on the mature third-generation silicon carbide fiber, and applied the composites in fields such as nuclear energy industrial heat exchangers and aero-engine combustor liners. In this paper, the basic concepts, the manufacturing process, the mechanical properties of SiC f/SiC composites and component verification and prospects of NITE process were reviewed, in order to provide the reference to a certain degree for the domestic development of this process.