粉末相组成对(Ti,W,Ta,Mo)(C,N)-(Co,Ni)金属陶瓷组织及性能的影响  

EFFECTS OF PHASE COMPOSITION OF POWDERS ON THE MICROSTRUCTURE AND PROPERTIES O F (Ti,W,Ta,Mo)(C,N)-(Co,Ni) CERMETS INCLUDING LESS AMOUNT OF Mo

作　　者：徐智谋[1] 易新建[1] 郑家燊[2] 熊维皓[3] 唐宏翚[4] 李祥辉[4] 向阳开[4] 

机构地区：[1]华中科技大学光电子工程系,武汉430074 [2]华中科技大学化学系,武汉430074 [3]华中科技大学材料科学与工程学院,武汉430074 [4]株洲硬质合金集团有限公司,株洲412000

出　　处：《复合材料学报》2003年第4期39-45,共7页Acta Materiae Compositae Sinica

基　　金：中国博士后科学基金;国家自然科学基金项目(50074017);教育部博士点基金项目(1999048714);湖北省重点科技发展项目(992P0322)。

摘　　要：　采用自制的多元复式碳(氮)化物陶瓷粉末制备少Mo的(Ti,W,Ta,Mo)(C,N)-(Co,Ni)金属陶瓷。研究了粉末相组成对金属陶瓷组织及性能的影响。结果表明,多元复式碳(氮)化物固溶体的晶格常数与元素的固溶度有很好的对应关系。金属陶瓷中含Ta,W等重金属元素的多元复式碳化物的加入,有利于重金属元素向粘结相中均匀扩散,相对减缓了低元相Ti(C,N)的分解,使材料的性能得到较大的提高,组织主要表现为单层环形相结构特征,富Ti硬质相减少,富(Ta,W)硬质相增多,且晶粒细小,无团聚现象。(Ti, W, Ta, Mo) (C,N)-(Co,Ni) cermets with the less amount of Mo whose chemical composition is Ti-W-Ta-Mo-Co-Ni-C-N were produced using the self-made pre-alloyed solid solution powders of carbides or/and nitrides. Effects of phase composition of powders on the microstructure and properties were studied. The results suggest that the good corresponding relationships between the lattice constant of the pre-alloyed solid solution powders and the solid solution extent of elements are obtained. The addition of the pre-alloyed solid solution powders including the heavy metal elements of Ta and W is favorable to the spreading of heavy metal elements in the binders. The dissolution of Ti(C,N) is reduced. The performance of cermets is improved. The cermets have the monolayer core-rim structure. The content of hard grains of wealthy Ti is reduced and the content of hard grains of wealthy Ta and W is increased. The grains of cermets are fined. The features of aggregation are not observed.

关 键 词：粉末相组成 金属陶瓷 组织 性能 

分 类 号：TF123[冶金工程—粉末冶金]