STRUCTURE TRANSITION OF MECHANICAL ALLOYING OF Mo AND Si POWDERS

作     者：Ma Qin, Zhang Jianbin and Yin Jie (Gansu University of Technology, Lanzhou, China, 730050) Xue Qunji (Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China, 730000) 

会议名称：《21世纪重有色金属冶金高新技术及新材料国际会议》

会议日期：2002年

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

关 键 词：STRUCTURE TRANSITION OF MECHANICAL ALLOYING OF Mo AND Si POWDERS 

摘      要：The solid-state reaction of Mo and Si mixed powders produced by the mechanical alloying (MA) was examined using differential thermal analyzer (DTA) and X-ray diffraction (XRD). XRD patterns presented herein suggested that the volume fraction of β-MoSi2 increased with increasing milling time. After milling for 5 h, a weaker diffraction line of (101) plane of hexagonal p-MoSi2 was observed, from 15 h to 50 h, the diffraction lines contributed by α-MoSi2 emerged and remained almost unchanged, but up to 163 h, α-MoSi2 peaks disappeared from the XRD pattern and DTA experiments found that there were two exothermic peaks.