爆炸粉末烧结机理的研究现状及其发展趋势

The Survey and Development Trend of the Research for the Mechanism of Explosive Consolidation of Powders

摘要:

分析了爆炸粉末烧结技术的高温、高压、瞬时作用及其在新材料开发，特别是在粉末冶金中不可替代的特点和发展前景。从粉末材料状态方程、宏观机理和细观机理出发，综述了爆炸粉末烧结机理的研究进展。最初作为多孔材料本构模型提出的p-α模型经过不断修正已能反映孔隙的完全闭合并计入熔化效应；在宏观机理的研究上，除实验外，数值模拟已被用丁分析烧结机理及各种实际因素对烧结质量的影响；在细观机理上，综述了对爆炸粉末烧结过程中颗粒间结合机制和沉能方式的由浅入深的认识过程，简单闸述了各种沉能机制，分析了以往研究成果的不足，对其今后的发展方向进行了展望。

Abstract:

Because the technique of explosive consolidation of powders can produce high temperature and high pressure in very short time, it is promising in the exploiture of new materials especially in the consolidation of powders. However, the research of its mechanism is inadequate now. The research of the state equation of powders as well as the macroscopical and microcosmic mechanism of explosive consolidation of powders is discussed in this paper. Finally some suggestions for future development trend are put forward.