揭示曲率和随机效应对晶粒生长动力学的影响：极值原理的热力学观点
Revealing curvature and stochastic effects on grain growth kinetics: A thermodynamic perspective from the extremal principle
摘要：
在正常晶粒长大的理论发展中，“漂移”（曲率效应）和“扩散”（随机效应）的作用多年来一直是一个悬而未决的问题。通过将微观结构熵和晶粒拓扑相互作用的贡献与热力学极值原理（TEP）相耦合，扩展了现有的晶粒生长热力学框架。它不仅从热力学角度解释了曲率和随机效应，而且为晶粒生长提供了一个新的平均场模型。通过热力学修正，该模型能够高精度地再现已有的超大相场模拟结果。
英文摘要：
In the theoretical development of normal grain growth, the roles of "drift" (curvature effect) and "diffusion" (stochastic effect) have been an open question for many years. By coupling contributions of microstructure entropy and grain topological interactions with thermodynamic extremal principle (TEP), this letter extends the existing thermodynamic framework of grain growth. It not only explains the curvature and stochastic effects by thermodynamics but provides a new mean-field model for grain growth. Through thermodynamic modification, this new model can yield a high accuracy representation of existing ultra-large phase-field simulated results.
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