(武漢工業(yè)大學(xué)生物材料與工程研究中心，武漢 430070)
摘 要: 利用XRD，EPMA和HREM等測試技術(shù)對AlN/SiCw(Y2O3-SiO2)復(fù)合材料熱處理增強(qiáng)機(jī)理進(jìn)行了研究。結(jié)果表明: 材料在1300℃空氣中進(jìn)行熱處理，其氧化處理過程也是其熱處理增強(qiáng)過程，增強(qiáng)機(jī)理主要是由于氧化擴(kuò)散改變了粒界玻璃相的相組成，粒界玻璃相在高溫氧化氣氛下和AlN顆粒發(fā)生作用，生成AlN多形體2HδSialon相，并與SiC晶須形成空間交錯的結(jié)構(gòu)。
關(guān)鍵字: AlN/SiCw(Y2O3-SiO2)復(fù)合材料 熱處理 增強(qiáng)機(jī)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
