铝热快速凝固工艺合成高强TiC/FeNiCr复合材料  

High-strength TiC/FeNiCr Composite Produced by Rapid Solidification Thermite Process

作　　者：甘黎军[1] 席文君[1] 张涛[1] 

机构地区：[1]北京航空航天大学材料科学院与工程学非平衡材料实验室,北京100083

出　　处：《热加工工艺》2006年第5期1-4,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(50472100)

摘　　要：采用铝热快速凝固工艺制备了FeNiCr合金及TiC／FeNiCr复合材料,利用光学显微镜、扫描电镜、X射线衍射等手段研究了该复合材料的显微组织和相结构,测量了复合材料的压缩强度。结果表明,TiC／FeNiCr复合材料由TiC陶瓷增强相和α-Fe合金基体组成。TiC／FeNiCr复合材料组织细小,TiC呈多边形均匀分布在合金基体中,晶粒尺寸约为2-3μm。TiC对FeNiCr基体具有很好的晶粒细化及强化作用,TiC／FeNiCr的压缩断裂强度及形变率分别为2 760MPa及25％,远大于FeNiCr合金及部分Fe基非晶材料。The FeNiCr alloy and TiC/FeNiCr composites were prepared by the rapid solidification thermite process. The microstrucmre and the phase structure of the FeNiCr alloy and TiC/FeNiCr composites were investigated by means of OM, SEM and XRD. The compressive property of the composite was measured. Results show that the TiC and α-Fe are the only two phases in the TiC/FeNiCr composite. The TiC particles take the shape of polygon and are distributed uniformly in the composite. The grain size of the α-Fe matrix is notablely refined and the mechanical property is significantly reinforced by the TiC particles. The compressive fracture strength and compressibility of the TiC/FeNiCr are 2 760MPa and 25%, respectively, which are greatly improved than those of the FeNiCr alloy and some of Fe-based glass.

关 键 词：铝热反应 快速凝固 TIC 复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程]