“化学炉”辅助燃烧原位合成SiC／MoSi2复合材料  

In-situ Synthesis of SiC/MoSi_2 Composites by "Chemical Oven"-aided Combustion

作　　者：颜建辉[1] 唐思文[1] 张厚安[1] 

机构地区：[1]湖南科技大学机电工程学院

出　　处：《矿冶工程》2008年第1期78-80,共3页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助项目(50405041);湖南教育厅资助项目(06C316)

摘　　要：以Mo、Si和C单质粉为原料,采用自蔓延原位合成技术制备10%SiC、20%SiC(体积分数)强韧化MoSi2复合材料,并从理论上计算了自蔓延燃烧反应绝热温度。结果表明,常规自蔓延能够合成10%SiC/MoSi2复合粉体,而通过"化学炉"辅助燃烧能够合成20%SiC/MoSi2材料。复合粉末主要由MoSi2和SiC相组成,SiC颗粒分布均匀,与MoSi2基体结合良好,其断裂机理为穿晶断裂。Strengthened and toughened MoSi2 composites with 10% SiC and 20% SiC （volume fraction） were fabricated by high temperature self-propagating synthesis with Mo, Si and C elementary powders as raw materials. The adiabatic temperature of combustion reaction was calculated theoretically. The results indicated that the synthesis of 10% SiC/MoSi2 composite powders was possible by conventional high temperature self-propagating. However, 20% SiC/MoSi2 composites could be synthesized by ＂Chemical Oven＂-aided combustion method. The phase composition of SiC/MoSi2 composites mainly included MoSi2 and SiC. The SiC particles were homogeneously distributed and combined well with MoSi2 matirx. The fracture mechanism of the composites is transgranular fracture.

关 键 词：SIC/MOSI2复合材料 MOSI2 SIC 化学炉 原位合成 

分 类 号：TG146.4[一般工业技术—材料科学与工程]