摘要：颗粒的粒度对变形特性及断裂过程有重要影响．本文从能耗理论入手，分析了超微颗粒的断裂机理，并指出应力释放是实现超微颗粒制备的理想模式．

关键词：超微颗粒；断裂理论；应力释放

Abstract：Deformation and fracture behaviour of particles are strongly influenced by particlesize. Based on the energy consum theory ,this paper deals with the fracture mechanism of ultrafineparticles. It is illustrated that stress release is the most favourable preparation model.

Keywords：ultrafine particle ; fracture mechanism ;stress release