Non-Equilibrium Solidification of Undercooled Metallic Melts
Non-Equilibrium Solidification of Undercooled Metallic Melts
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DOI：
10.4028/www.scientific.net/kem.81-83.83
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发表时间：
1993-01
期刊：
影响因子：
--
通讯作者：
D. Herlach
中科院分区：
文献类型：
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作者：
D. Herlach
摘要过冷熔体的非平衡态可以用来研究亚稳固相形成过程中的各种现象。本文综述了这一领域的研究现状。详细讨论了过冷熔体的热力学、形核和生长过程，特别强调了亚稳态形成的条件，例如亚稳态结晶金属、准晶体、金属玻璃、过饱和溶液和晶粒细化材料。在过冷熔体的非平衡凝固现象的原位调查所需的技术进行了讨论，并评估其潜在的这种调查。还包括该领域微重力研究的各个方面。
Abstract The non-equilibrium state of an undercooled melt allows the investigation of various phenomena involved in the formation of metastable solid phase. The present work reviews the present state of the art in this field. In detail, the thermodynamics of the undercooled melt, nucleation and growth processes are discussed, with special emphasis on the conditions of the formation of metastable states, such as metastable crystalline metals, quasi-crystals, metallic glasses, supersaturated solutions and grain-refined materials. The techniques needed for the in-situ investigation of non-equilibrium solidification phenomena in undercooled melts are discussed, and their potential for such investigations is evaluated. Aspects of microgravity research in this field are also included.