摘要
采用ZJM10T型搅拌球磨机和X射线衍射仪(XRD),研究了机械研磨(MG)条件下MoSi2的同素异构转变及其非晶化,并对其转变机理进行了初步分析和讨论.结果表明,当球料比为10∶1,球磨机转速为450r/min时,MoSi2粉末在机械球磨80h后,没有H MoSi2生成;而当球料比为20∶1,转速为600r/min时,机械球磨60h,已有少量的H MoSi2生成,同时随着球磨时间的增加H MoSi2的量逐渐增加.继续机械研磨,MoSi2合金粉末呈非晶化.试验结果证实相对高的能量有助于MoSi2的固态相变.
Employing a stirringtype ballmill ZJM10T and Xray diffractometer, the isomeric phase transition of MoSi2 and its noncrystallization are investigated by means of mechanical grinding. The mechanism of isomeric transition of MoSi2 at roomtemperature is also analysed and discussed. The result shows that there is no nanocrystallite HHoSi2 to form when the powderball ratio is 10∶1, rotation speed is 450 rpm, and the grinding timeperiod is 80 h; when, however, the parameters abovementioned become 20∶1, 600, and 60 h, respectively, there will be a small amount of HMoSi2 formed; and with increasing the grinding timeperiod, the amount of HMoSi2 will gradually increase and the powder with take the form of noncrystalline. Experimental results verify the fact that relatively high energy is conducive to the solidstate phase transition of MoSi2.
出处
《甘肃工业大学学报》
北大核心
2002年第4期39-42,共4页
Journal of Gansu University of Technology
基金
教育部高等学校骨干教师资助计划