Influence of bubbles on grain growth in ice
Influence of bubbles on grain growth in ice
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DOI：
10.1016/j.jsg.2012.11.003
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发表时间：
2014-04
影响因子：
3.1
通讯作者：
Jens Roessiger;P. Bons;S. H. Faria
中科院分区：
文献类型：
--
作者：
Jens Roessiger;P. Bons;S. H. Faria
数值静态晶粒生长模拟的冰与气泡作为第二相显示了显着下降的晶粒生长速率相比，无气泡的冰。这种增长率下降的幅度取决于气泡边界流动性、空气的体积分数、平均气泡尺寸和气泡尺寸分布。晶粒生长速率首先降低，随着微观结构向稳定状态演变。只有这样，晶粒生长才遵循平均晶粒面积随时间的预期线性增长。在实验中，这种生长速率的降低可能被错误地解释为具有偏离生长指数的生长。
Numerical static grain growth simulations of ice with air bubbles as a second phase show a significant drop in grain-growth rate compared to bubble-free ice. The magnitude of this drop in growth rate is dependent on the bubble boundary mobility, the volume fraction of air, the average bubble size and the bubble size distribution. The rate of grain growth decreases at first, as the microstructure evolves towards a steady state. Only then does grain growth follow the expected linear increase of mean grain area with time. In experiments, this decrease in growth rate could erroneously be interpreted as growth with a deviating growth exponent.