氮化硅颗粒对碳—石英复合材料性能的影响

Influence of Si 3N 4 Particle on Properties of Carbon Fiber Reinforced Silica Composite

在碳—石英复合材料中加入氮化硅颗粒可提高其力学性能，但少量鳞石英的析出使材料的热学性能恶化。同时，由于氮化硅减缓了碳纤维的氧化，可以提高材料的抗烧蚀性能。地面模拟实验表明，加入氮化硅颗粒的碳—石英复合材料完全符合某些航天器件的使用要求。

The addition of Si 3N 4 particles to carbon fiber reinforced silica composite increases the mechanical properties, but decreases the thermal properties of the composite because of the precipitation of tridymite. The addition of Si 3N 4 reduces the oxidation of carbon fibers and increases the burning erosion resistance. Result of simulation carried out on the ground shows that such composite can meet the requirements for application to some spaceflight parts.