(1. 清华大学 材料科学与工程系，北京100084;
2. 石油大学（华东） 机电工程学院， 东营 257062)
摘 要: 用燃烧合成技术在钢板表面制备了金属陶瓷复合涂层。 采用X射线衍射（XRD）、 扫描电镜（SEM）、 能谱（EDS）、 硬度测定及抗热震性等实验对合成的涂层进行了研究。 结果表明：涂层主要是由Cr3C2， Cr7C3及AlN等多相金属陶瓷组成的复合体系， 其显微组织均匀致密， 与基体之间为冶金结合， 硬度是基体的4～5倍， 抗热震实验显示涂层具有良好的结合力。 为改善涂层的润湿性，利用Cr与Fe在高温下形成的金属间化合物作为过渡层， 取得了良好的效果。
关键字: 燃烧合成； 金属陶瓷； 涂层
steel plate by combustion synthesis
（1. Department of Materials Science and Engineering,
Tsinghua University, Beijing 100084, China;
2. College of Mechanical-Electronic and Engineering,
University of Petroleum, Dongying 257062, China）
Abstract:The cermet coating was prepared on steel plate by combustion synthesis method. The coating was investigated by means of XRD, SEM, EDS, micro-hardness measure and thermal shock resistance test. The microstructure and phase composition analyses on the synthesized sample show that the coating is a multiphase composite system consisting of Cr3C2，Cr7C3 and AlN. The surface of coating is even and the interface of coating is metallurgical bonding. The micro-hardness of the coating is 4 or 5 times higher than that of the substrate. The result of thermal shock resistance test shows that the coating has good bonding strength. In order to improve wettability between coating and substrate, metallic Cr, which has good dissolvability in Fe, was selected as a wetting functional component, and a better effect was obtained.
Key words: combustion synthesis; cermet; coating
