扩散性第一阶段过渡:固体中的核化,生长和粗化
D Simeone1, O Tissot1, L Luneville1
1Université Paris-Saclay, CEA,Service de Recherches en Matériaux et procédés Avancés, 91191 Gif-sur-Yvette, France.
概括
本综述统一了经典核化理论和第一阶段相场建模的第一阶段相位过渡. 它探讨了原子学和连续性方法之间的联系,为核化,生长和粗化过程提供了新的见解.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 第一阶段过渡,包括核形成和生长,是各种自然和合成系统中观察到的基本过程.
- 经典核化理论 (CNT) 和相场 (PF) 建模为这些转变提供了不同的,但互补的观点.
- 最近计算方法和实验技术的进步需要对这些方法的统一理解.
研究的目的:
- 综合当前关于古典核化理论和第一阶段相场转换的相场建模的知识.
- 阐明这些看似对立的方法的联系和局限性.
- 提出一个统一的框架,以宏观波动理论为基础,用于理解核化,生长和粗化.
主要方法:
- 审查和综合关于核和生长理论的现有文献.
- 扩展Cahn-Hilliard形式主义,以模型核和生长.
- 讨论用于解释实验数据的伪脊柱线概念.
- 在宏观波动理论中整合概念.
主要成果:
- 证明原子 (CNT) 和连续 (PF) 方法之间的相位过渡之间的联系.
- 将扩展的Cahn-Hilliard形式论应用于核和生长,使分析能够超出溶解度和旋转极限.
- 识别新的实验数据来测试理论模型.
结论:
- 一个统一的理论框架可以调和经典的核化理论和相场建模.
- 扩展的Cahn-Hilliard方法为研究相位过渡提供了更具预测性和多功能性的工具.
- 这种统一方法的进一步发展有助于推进材料科学和理解复杂现象.
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