Si3N4-SiC复相陶瓷及其碳纤维复合材料研究进展

介绍了不同工艺制备的Si3N4,SiC的性能，研究了Si3N4-SiC复相陶瓷及其碳纤维复合材料研究发展现状，认为Si3N4-SiC复相陶瓷能够克服单一－Si3N4,SiC陶瓷断裂韧性低，烧结过程中晶粒长大造成强度下降等缺点，同时也弥补了SiC陶瓷强度较低的遗憾；而碳纤维的加入可以大大改善材料的韧性，认为结合Si3N4-SiC复相陶瓷的高强度和碳纤维复合材料的高韧性，可以制备出性能优良的Cf/SiC-Si3N4陶瓷基复合材料，并就此方面的;研究进展进行了综述。

Development of Si3N4-SiC and its Carbon Fiber Reinforced Composites

In this paper, the properties of Si 3N 4 and SiC prepared by different processes were introduced,and the development of Si 3N 4-SiC and its carbon fiber-reinforced composite materials were reviewed.It is concluded that the Si 3N 4-SiC can overcome disadvantages of single Si 3N 4 or SiC, which has low toughness and strength with grain growth during sintering.However the addition of carbon fiber can improve the toughness of the materials.Combined the high strength of Si 3N 4-SiC with the high toughness of its carbon fiber-reinforced composite materials, a kind of composite material with better properties can be prepared.Some studies in this field are summarized.