金刚石/碳化硅复合材料的研究进展

Research Progress of Diamond/SiC Composites

金刚石/碳化硅复合材料综合了碳化硅与金刚石的优点,具有高热导率、低热膨胀系数、高比刚度、高硬度以及耐磨损等优异性能,具有广阔的应用前景,是陶瓷基复合材料领域研究的重点之一。金刚石/碳化硅复合材料的制备最早采用高温高压法,该方法可以有效避免金刚石颗粒石墨化带来的有害影响。随着技术的不断发展,出现了多种制备方法。不同的制备工艺下,金刚石/碳化硅复合材料内部的主要相含量、界面相结构及微观组织等因素决定了复合材料的整体性能水平。本文综述了国内外金刚石/碳化硅复合材料的研究与发展现状,从制备方法、性能特点、微观组织及界面反应机制等方面进行了阐述,分析了当前金刚石/碳化硅复合材料研究存在的问题,并对该复合材料的未来发展方向进行了展望。

Diamond/SiC composites combine the advantages of SiC and diamond,and have excellent properties such as high thermal conductivity,low thermal expansion coefficient,high specific stiffness,high hardness and wear resistance,which have broad application prospects,and are one of the key research focuses in the field of ceramic matrix composites.Diamond/SiC composites are first prepared by high temperature and high pressure method,which can effectively avoid the harmful effects of graphitization of diamond particles.With the continuous development of technology,a variety of preparation methods have emerged.The properties of diamond/SiC composites are determined by the major phase content,interfacial phase structure and microstructure under different preparation methods.This paper reviews the research and development status of diamond/SiC composites at home and abroad,describes the preparation method,performance characteristics,microstructure and interfacial reaction mechanism,analyzes the current problems of diamond/SiC composites,and gives an outlook on the future development of this composites.