颗粒粒度对碳化钨颗粒增强铁基复合材料界面的影响  

Effect of Particles Size on Interface of Tungsten Carbide Particles Reinforced Iron Matrix Composites

作　　者：冯志扬 李祖来[1] 山泉[1] 蒋业华[1] 周荣[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《材料工程》2016年第1期83-88,共6页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51361019)

摘　　要：采用常压烧结方法成功制备了碳化钨颗粒增强铁基复合材料,研究了碳化钨颗粒粒度对复合材料组织、界面及力学性能的影响。结果表明：随着碳化钨颗粒粒度的减小,颗粒熔解程度增大,主要熔解的是W2C,WC熔解的数量较少;界面主要的反应产物为Fe3W3C,Fe3W3C含量随着颗粒粒度的减小而增加,界面随着颗粒粒度的减小由连续变成间断,直至不存;颗粒粒度越大,材料的硬度及压缩强度均提高;当颗粒粒度为380-550μm时,反应生成物Fe3W3C与碳化钨颗粒体积比为1∶1,界面呈连续状,复合材料具有较好的综合性能。Tungsten carbide particles reinforced iron matrix composites were successfully prepared by the normal pressure sintering technology.The effects of tungsten carbide particles size on the microstructure,interface and mechanical properties of composites were investigated.The results show that the melting degree of the tungsten carbide particles increases with the decrease of particles size.W2C is melted more than WC in the tungsten carbide particles.The main product of the interface reaction is Fe3W3C.The volume fraction of Fe3W3C increases with the decrease of particles size,while the interface is changed from continuous to discontinuous and even disappeared with the decrease of particles size.The hardness and compressive strength of composites increase with the increasing of particles size.When the particles size is 380-550μm,the composites consist of Fe3W3C and tungsten carbide particles in volume proportion of 1∶1,the interface is continuous and the composites have good mechanical properties.

关 键 词：复合材料 界面 粒度 Fe_3W_3C 

分 类 号：TB333[一般工业技术—材料科学与工程]