(Ti_(1-x),W_x)C基金属陶瓷制备、组织与性能  

Preparation,microstructure and properties of(Ti_(1-x),W_x )C based cermets

作　　者：张国鹏[1] 熊惟皓[1] 陈珊[1] 陈肖[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2014年第6期43-47,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技重大专项资助项目(2009ZX0401-022);教育部创新团队发展计划资助项目(IRT1244);广东省教育部产学研合作重大项目(2009A090100015);华中科技大学自主创新研究基金资助项目(2013TS064)

摘　　要：采用碳热还原法制备了不同W含量的(Ti1-x,Wx)C固溶体(摩尔分数x=0.00,0.07,0.17,0.32),研究了反应温度对产物的物相组成和(Ti,W)C粉末特性的影响,并以(Ti1-x,Wx)C为硬质相制备了(Ti1-x,Wx)C-20Ni金属陶瓷,对其组织和力学性能进行表征.结果表明:随着温度升高,TiO2和WO3被逐步还原并碳化;(Ti1-x,Wx)C固溶体粉末的晶粒尺寸和晶格参数均随W含量的提高而降低;(Ti1-x,Wx)C基金属陶瓷组织中无明显芯/环结构,随着W含量的提高,陶瓷晶粒细化、孔洞数量减少、组织更均匀;当W含量为x=0.17,0.32时,其综合力学性能较好.（Ti1-x,Wx）C solid solution powders（x=0.00,0.07,0.17,0.32）were synthesized by carbothermal reduction reaction for preparing（Ti1-x,Wx）C-20Ni cermets.The effect of reaction temperature on phase composite and characteristics of（Ti1-x,Wx）C was studied.The microstructure and mechanical properties of（Ti1-x,Wx）C-20Ni cermets were investigated.The results suggest that TiO2 and WO3 are reduced and carbonized gradually.The lattice parameter and average agglomerate size of（Ti,W）C solid solution powders decrease with increasing W content.（Ti1-x,Wx）C based cermets do not show obvious core/rim structure,and the ceramic grains are refined while the number of pores decreased with the increase of W content.When mole fraction of W reached x=0.17,0.32,the comprehensive mechanical properties are outstanding.

关 键 词：(Ti1-x Wx)C固溶体 碳热还原法 金属陶瓷 显微组织 力学性能 

分 类 号：TG148[一般工业技术—材料科学与工程]