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金属学报  2004 

马氏体相变的形核问题

, PP. 337-341

Keywords: 马氏体相变,形核几率,形核能垒

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Abstract:

在对马氏体相变经典形核理论阐述的基础上,仔细考察了Fisher等以统计物理对形核几率的原始推导,指出一些学者近年来否定Cohen和Kaufman马氏体相变形核几率计算的错误,确定形核几率计算中的形核能垒ΔG*应为临界核胚中所有原子的总自由能变化,而不应为核胚中单个原子的自由能.对他们佐证均匀形核观点所引用的实验给予了重新解释,对他们提出的形核模型进行了评论.最后简要提出研究马氏体相变形核问题的几个可能方向.

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