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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于曲率驱动机制的晶粒生长元胞自动机模型
, PP. 1210-1214
Keywords: 晶粒生长,元胞自动机,动力学
Abstract:
结合晶粒生长的统计分析理论和概率性转变规则,建立了基于曲率驱动机制的晶粒正常生长的二维元胞自动机模型.该模型的一个显著特点是晶粒生长速率和晶界曲率(1/Rc--1/R)之间满足线性关系,而传统的元胞自动机模型则难以满足这种线性关系.模拟结果比较全面地反映了等温条件下晶粒正常生长的各种现象平均晶粒面积与时间的关系,晶粒尺寸、晶粒边数的分布规律及其时间不变性,晶粒边数与尺寸的关系,以及晶粒生长速率与晶粒尺寸和曲率的关系等.模拟结果与晶粒生长的动力学理论预测相符合.
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