【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.更多还原

【Abstract】 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.更多还原