Plasma preparation and low-temperature sintering of spherical TiC –Fe composite powder  

作　　者：Jian-jun Wang Jun-jie Hao Zhi-meng Guo Song Wang 

机构地区：[1]Institute for Advanced Materials and Technology, University of Science and Technology Beijing [2]Research and Development Center, CSR Qingdao Sifang Co., Ltd.

出　　处：《International Journal of Minerals,Metallurgy and Materials》2015年第12期1328-1333,共6页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51274039);the Research Fund for the Doctoral Program of Higher Education of China (No. 20120006110007)

摘　　要：A spherical Fe matrix composite powder containing a high volume fraction （82vo1%） of fine TiC reinforcement was produced using a novel process combining in situ synthesis and plasma techniques. The composite powder exhibited good sphericity and a dense structure, and the fine sub-micron TiC particles were homogeneously distributed in the α-Fe matrix. A TiC-Fe cermet was prepared from the as-prepared spherical composite powder using powder metallurgy at a low sintering temperature; the product exhibited a hardness of HRA 88.5 and a flexural strength of 1360 MPa. The grain size of the fine-grained TiC and special surface structure of the spherical powder played the key roles in the fabrication process.A spherical Fe matrix composite powder containing a high volume fraction （82vo1%） of fine TiC reinforcement was produced using a novel process combining in situ synthesis and plasma techniques. The composite powder exhibited good sphericity and a dense structure, and the fine sub-micron TiC particles were homogeneously distributed in the α-Fe matrix. A TiC-Fe cermet was prepared from the as-prepared spherical composite powder using powder metallurgy at a low sintering temperature; the product exhibited a hardness of HRA 88.5 and a flexural strength of 1360 MPa. The grain size of the fine-grained TiC and special surface structure of the spherical powder played the key roles in the fabrication process.

关 键 词：powder technology cermets radio frequency plasma SINTERING numerical simulation 

分 类 号：TB383.3[一般工业技术—材料科学与工程]