Demonstrating the Temperature Gradient Impact on Grain Growth in UO2 Using the Phase Field Method

被引：41

作者：

Tonks, Michael R. ^{[1
]}

Zhang, Yongfeng ^{[1
]}

Bai, Xianming ^{[1
]}

Millett, Paul C. ^{[2
]}

机构：

[1] Idaho Natl Lab, Fuel Modeling & Simulat, POB 1625, Idaho Falls, ID 83415 USA

[2] Univ Arkansas, Dept Mech Engn, Fayetteville, AR 72701 USA

来源：

MATERIALS RESEARCH LETTERS | 2014年 / 2卷 / 01期

关键词：

Grain Growth; Temperature Gradient; Phase Field Method; UO2;

D O I：

10.1080/21663831.2013.849300

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundaries (GBs) are driven to migrate up a temperature gradient. In this work, we use a phase field model to investigate the impact of temperature gradients on isotropic grain growth. GB motion in 2D UO2 polycrystals is predicted under increasing temperature gradients. We find that the temperature gradient does not significantly impact the average grain growth behavior because the curvature driving force is dominant. However, it does cause significant local migration of the individual grains. In addition, the temperature dependence of the GB mobility results in larger grains in the hot portion of the polycrystal.

引用

页码：23 / 28

页数：6

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