铝热法制备TiC/TiB_2-FeNiCr复合材料  

TiC/TiB_2-FeNiCr Composite Prepared by Thermite Reaction

作　　者：刘洋[1] 席文君[1] 丁泽华[1] 李文静[1] 李晓鲲[1] 李树杰[1] 

机构地区：[1]北京航空航天大学,北京100191

出　　处：《稀有金属材料与工程》2015年第3期688-691,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51072011)

摘　　要：采用铝热法原位合成出了含Ti C颗粒、Ti C-Ti B2复相陶瓷颗粒增强相体积分数较高的Ti C/Ti B2-Fe Ni Cr复合材料。利用电子探针分析(EPMA)仪、扫描电镜(SEM)、透射电镜(TEM)和X射线衍射(XRD)仪等手段研究了该复合材料的显微组织和相结构,同时利用显微硬度仪测量了该复合材料的硬度,利用摩擦磨损试验机测量复合材料的耐磨性能。结果表明,Ti C/Ti B2-Fe Ni Cr复合材料由Ti C颗粒、Ti C和Ti B2复相陶瓷颗粒、针状Cr7C3相,Ni Al相和α-Fe Ni Cr合金基体相组成。复合材料的硬度(HV)为13132.5 MPa。复合材料施加载荷20 N,磨损1 h后的失重为4.2 mg;而45#钢在相同条件下的失重量为13 mg,是复合材料的3倍。Ti C/Ti B2-Fe Ni Cr composites enhanced by Ti C particles and Ti C-Ti B2 multiphase particles were in-situ synthesized by thermite reaction. The microstructure and phase structure were investigated by electron probe microanalysis（EPMA）, scanning electron microscopy（SEM）, transmission electron microscope（TEM） and X-ray diffraction（XRD）. The hardness and wear resistance were tested by the Vickers indentation method and friction-wear testers, respectively. Results show that the Ti C/Ti B2-Fe Ni Cr composites are composed of Ti C,Ti C-Ti B2 multiphase particles, Cr7C3, Ni Al and α-Fe Ni Cr. The Vickers hardness of composites is 13132.5 MPa. The composite mass wear loss is 4.2 mg after wearing for 1 h with 20 N force and that is nearly one third of the mass loss of 0.45C% steel.

关 键 词：铁基复合材料 铝热反应 TIC TIB2 

分 类 号：TB33[一般工业技术—材料科学与工程]