(武汉工业大学生物材料与工程研究中心，武汉 430070)
摘 要: 利用XRD，EPMA和HREM等测试技术对AlN/SiCw(Y2O3-SiO2)复合材料热处理增强机理进行了研究。结果表明: 材料在1300℃空气中进行热处理，其氧化处理过程也是其热处理增强过程，增强机理主要是由于氧化扩散改变了粒界玻璃相的相组成，粒界玻璃相在高温氧化气氛下和AlN颗粒发生作用，生成AlN多形体2HδSialon相，并与SiC晶须形成空间交错的结构。
关键字: AlN/SiCw(Y2O3-SiO2)复合材料 热处理 增强机理
（Biomedical Materials and Engineering Center, Wuhan University of Technology, Wuhan 430070, P. R. China）
Abstract:The mechanisms of heat-treatment reinforcement of AlN/SiCw(Y2O3-SiO2) composites were studied by using XRD, EPMA and HREM techniques. The results showed that the strength of AlN/SiCw(Y2O3-SiO2) composites can be increased by heat-treatment at 1300℃ in air, and the oxidation process of composites is just as that of heat-treatment of composites. The mechanism of heat-treatment reinforcement and toughing of composites results from that the glass phase whose composition is varied by the diffusion of oxygen in heat-treatment reacts with AlN at high temperature oxidizing atmosphere to form the crossing structure of fibrous 2Hδ sialon and SiC whisker.
Key words: AlN/SiCw(Y2O3-SiO2) composites; heat-treatment; strengthening mechanism
