球磨作用下陶瓷粉体材料的机械化学相变行为机制研究进展

Research Progress in Behavior and Mechanism of Mechano-Chemical Phase Transformation of Ceramic Material under Ball Milling

概述了球磨作用下陶瓷粉体材料的机械化学效应与相变行为,通过机械化学相变过程的能量学分析,确定其实质是"晶粒尺寸效应",球磨提供的能量大小及方式是影响陶瓷粉体机械化学效应与相变行为的关键因素;球磨作用下,陶瓷粉体产生结构缺陷与发生相变的主要作用机制是应力/应变诱导下的剪切作用;粉体材料剪切形变与剪切微观结构演变、球磨介质及环境(气氛)的物质交换/化学作用对相变过程的影响研究不深入,极大地阻碍了陶瓷粉体机械化学相变研究成果的产业化应用及技术的精细化发展;这将是我们进一步研究的重点。

The mechano-chemical effects and phase transformation behavior of ceramic powder materials under ball milling are summarized in this paper. The essence of the mechano-chemical effects and phase transformation behavior is ＂grain size effect＂. The magnitude and mode of the energy input produced by ball milling are the key factors affecting the mechano-chemical effects and phase transformation behavior of ceramic powder materials. The shear effect induced by stress/strain is the main inducement to structural defect and phase transformation. The lack of in-depth researches on the shear deformation and microstructure evolution of powder materials and the effect of energy exchanging/chemical effect between milling media and ambient environment on the phase transformation greatly hinders the development of industrialization application and technology of mechano-chemical phase transformation of ceramic materials.