Synthesis of Nanocrystalline (Ti,Mo)C Solid Solution Powders via a Mechanically Induced Self-sustaining Reaction

摘要：

　　Nanocrystalline (Ti,Mo)C solid solution powders were obtained by high-energy ball milling of elemental titanium,molybdenum and carbon (graphite) powders under a argon atmosphere.X-ray diffraction analysis showed that (Ti,Mo)C solid solution formed abruptly via mechanically induced self-sustaining reaction (MSR) after 3 h ball milling.Scanning electron microscopy and transmission electron microscopy observation showed that nanocrystalline (Ti,Mo)C solid solution powders with an average grain size of about 30 nm were obtained after 8 h ball milling.The stoichiometry ratio (Ti/Mo molar ratio) in solid solution powders was controlled by metal-to-metal molar ratio and metal-to-carbon molar ratio in the starting powder mixture.The ignition of the MSR was suggested to be mainly controlled by the diffusion of C atoms.

关键词： (Ti,Mo)C solid solution mechanically induced self-sustaining reaction nanocrystalline

作者: Chen Xiao Xiong Weihao Yao Zhenhua Zhang Guopeng Chen Shan

作者单位: State Key Lab of Materials Formation and Dies & Moulds Technology,Huazhong University of Science and Technology,Wuhan 430074,PR China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 268-273

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）