材料相变过程中的形核理论 |
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引用本文: | 张柯,刘峰,杨根仓,周尧和.材料相变过程中的形核理论[J].西安工业大学学报,2012,32(12):947-958. |
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作者姓名: | 张柯 刘峰 杨根仓 周尧和 |
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作者单位: | 西北工业大学凝固技术国家重点实验室,西安,710072 |
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基金项目: | 基金资助:国家自然科学基金项目(51071127,50901059);国家杰出青年科学基金(50125002);国家重点基础研究发展973计划(2011CB610403);111引智计划(B08040);凝固技术国家重点实验室自由研究基金(09-QZ-2008,24-TZ-2009) |
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摘 要: | 形核过程作为一级不连续相变中的重要阶段,对其研究具有重要的理论和应用价值.从经典理论的提出,到现今各种经典理论的修正以及非经典形核理论的建立,已有近一个世纪的时间.立足于对形核理论的理解,从热力学和动力学两个方面对相变中的形核理论进行了阐述,并对一些重要公式进行了重新推导和诠释;结合实际相变过程,对形核理论中仍存在的问题及可能的解决方法进行了探讨.
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关 键 词: | 形核 团簇 经典形核理论 热力学 动力学 |
Nucleation Theories for Material Transformation Processes |
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Authors: | ZHANG Ke LIU Feng YANG Gen-cang ZHOU Yao-he |
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Affiliation: | (State Key Laboratory of Solidification Processing, Northwestern Polytechnieal University, Xian 710072,China) |
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Abstract: | It has both practical and theoretical meanings to investigate the nucleation, which is an important process during the first-order discontinuous phase transformation. It has been almost one century since the Classical Nucleation Theory (CNT) was built, and lots of modified CNT and Non- Classical Nucleation Theories (N-CNT) have been developed. On the bases of the understanding of varies nucleation theories,this paper illustrates the nucleation theories both on thermodynamics and kinetics, and re-derivates the basic equations of them. Some unsolved problems in the nucleation theories are also discussed combining with the practical phase transformation processes. |
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Keywords: | nucleation cluster classical nucleation theory (CNT) thermodynamics kinetics |
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