(1. 武汉理工大学 测试中心， 武汉 430070；
2. 武汉理工大学 材料复合新技术国家实验室， 武汉 430070)
摘 要: 综合介绍了分子式为Mn+1AXn的三元碳化物和氮化物的结构特征、制备方法、主要性能和应用前景。该类化合物为层状的六方晶体结构，空间群为P63/mmc；采用热等静压方法能制备出高纯、致密的材料；单相材料具有很好的导热性能和导电性能，有较低的显微硬度和较高的弹性模量和剪切模量，可以像金属一样进行加工，并在高温下具有塑性等金属特性，同时具有高的屈服强度，高熔点、高热稳定性等陶瓷特性。
关键字: Mn+1AXn； Ti3SiC2； 结构
excellent metal properties
（1. The Research & Test Center of Materials, Wuhan University of
Technology, Wuhan, 430070, P.R.China;
2. The State Key Lab of Advanced Technology for Materials Synthesis and Processing,
Wuhan University of Technology, Wuhan 430070, P.R.China）
Abstract:The ternary carbides and nitrides with the molecular formula of Mn+1AXn were summarized, and the structures, synthesis methods and main properties of the compounds were discussed. The compounds are layered hexagonal structures with group space of P63/mmc. The ceramics of them which have high purity and relative density can be synthesized by the hot-isostatic pressing. As a class of materials these compounds have a combination of excellent properties, including good electrical and thermal conductivities, relatively low Vickers hardness and good machinability, high elastic and shear modulus, as well as good oxidation resistance. In addition, the recent research progress on the compound Ti3SiC2 is mainly introduced.
Key words: Mn+1AXn; Ti3SiC2; structure
