【摘要】 深过冷熔体能够在低速冷却的情况下实现快速凝固 ,因而深过冷技术引起了人们的关注 ,并在这方面取得了很多成果 .本文分析了深过冷的热力学及动力学基础 ,综述了近年来深过冷技术的发展以及人们在其凝固特征方面的研究发现 .随着深过冷工艺的提高 ,可以获得的过冷度已大大超过了以前人们普遍认为均质形核所能达到的最大过冷度 0 .2Tm.深过冷的凝固组织使晶粒细化、杂质分布改善 ,普遍具有强韧化效果 .此外 ,利用深过冷技术还能制备常规凝固条件下不能得到的一些具有优异性能的新材料更多还原

【Abstract】 Much attention has been paid to undercooling technology for that undercoled melt can be rapidly solidified at low cooling speed. In this paper, the thermodynamics and dynamics basis of undercooling have been analyzed, and the development of undercooling technology as well as the solidification microstructure of undercooled melt in resent years have also been reviewed.更多还原