论文部分内容阅读
氯化硅、碳化硅等精密陶瓷与金属相比,具有重量轻、耐腐蚀、1000℃以上的耐热性以及强度高等优点,但存在脆性的缺点。近来新的能源(高温燃气炉、核聚变、太阳热发电等)和高效能量转换系统(超高温燃气涡轮、陶瓷发动机)的发展,地下资源和海洋资源的开发以及宇航、电子等工业的发展,单一组分的精密陶瓷已不能满足使用要求,因此出现CVD(化学气相沉积)、CVI(化学气相渗透)、纤维强化等复合材料、陶瓷涂层以及超细粉材料的新发展。
Compared with metal, precision ceramics such as silicon chloride and silicon carbide have the advantages of light weight, corrosion resistance, heat resistance over 1000 ° C and high strength, but have the disadvantages of being brittle. Recently, the development of new energy sources (hot gas furnaces, nuclear fusion, solar thermal power generation, etc.) and efficient energy conversion systems (ultra-high temperature gas turbines and ceramic engines), the development of underground and marine resources and the development of industries such as aerospace and electronics, A single component of precision ceramics is no longer adequate for the application, resulting in new developments in composite materials such as CVD (chemical vapor deposition), CVI (chemical vapor infiltration), fiber reinforced composites, ceramic coatings, and ultrafine powders.