Heterogeneous nucleation in Mg–Zr alloy under die casting condition
Heterogeneous nucleation in Mg–Zr alloy under die casting condition
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DOI：
10.1016/j.matlet.2015.07.147
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发表时间：
2015-12
影响因子：
3
通讯作者：
Wenchao Yang;Lin Liu;Jun Zhang;S. Ji;Z. Fan
中科院分区：
文献类型：
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作者：
Wenchao Yang;Lin Liu;Jun Zhang;S. Ji;Z. Fan
研究了压铸镁锆合金的异质形核行为。结果发现，高达48.78%的Zr颗粒可以用作形核，形核发生在弯曲和刻面界面。这意味着Mg-Zr合金中形核的尺寸效应不明显，并且这种形核行为与晶体学取向无关。因此，大范围的Zr核可以在大的过冷度下同时激活，通过延迟发光导致非常高的形核效率。
Heterogeneous nucleation behaviour was studied in die casting Mg–Zr alloy. It was found that up to 48.78% Zr particles could be used as nuclei and the nucleation occurred on curved and faceted interfaces. It meant that the size effect of nuclei in Mg–Zr alloy was insignificant, and this nucleation behaviour was independent on any crystallography orientation. Therefore, a large range of Zr nuclei could be activated simultaneously under the large undercooling through the delayed recalescence resulting in a very high nucleation efficiency.