摘要
在球、料质量比为24∶1的条件下对Mo-Si二元粉末进行了高能球磨,并对球磨反应过程进行了X射线衍射分析及透射电子显微镜研究.研究表明,在Mo-Si二元高能球磨过程中,既有Si向Mo中的扩散固溶,也有Mo向Si中的扩散固溶.热力学计算结果表明:Mo-Si二元体系具有形成非晶、固溶体及化合物的热力学驱动力;当Mo-Si储存的能量超过反应活化能时,反应生成h-MoSi2与t-MoSi2.
The Mo and Si powder in the mass ratio of steel balls to powder of 24 ： 1 was milled with an attritor, and the reaction mechanism was investigated with X-ray diffractormeter and transmission electron microscopy. The results show that in the milling process, the atoms of Mo and Si diffuse and dissolve into each other, and the thermodynamics simulation indicates the driving force to form solid solution, amorphous phase and compounds in the Mo-Si binary. The dissolving of Mo in Si and Si in Mo reduces the Gibbs free energy, and the h-MoSi2 and t-MoSi2 are finally formed as the stored energy of the Mo-Si binary exceeding the activation energy during finer milling.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2006年第9期1062-1065,1113,共5页
Journal of Xi'an Jiaotong University
基金
教育部高等学校博士学科点专项科研基金资助项目(20040698053)
教育部科学技术研究重点资助项目(105159)
西安市工业科技攻关资助项目(GG04057)
