Repeated nucleation behaviors of pure bismuth under a high magnetic field
Repeated nucleation behaviors of pure bismuth under a high magnetic field
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DOI：
10.1016/j.jallcom.2020.154746
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发表时间：
2020-08
影响因子：
6.2
通讯作者：
Zhipeng Long;Jiantao Wang;Y. Fautrelle;Xi Li
中科院分区：
文献类型：
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作者：
Zhipeng Long;Jiantao Wang;Y. Fautrelle;Xi Li
采用差热分析（DTA）方法研究了强磁场（HMF）对纯铋重复形核行为的影响。HMF降低了过冷度的最大值和平均值。此外，HMF有助于稳定过冷度，因为HMF抑制热对流。此外，通过对随机成核事件的统计分析，计算了成核速率。HMF下过冷度的降低主要归因于接触角的减小，接触角的减小是通过在经典球冠形核非均质成核理论的基础上拟合成核速率来计算的。
The influence of a high magnetic field (HMF) on the repeated nucleation behaviors of pure bismuth has been investigated by differential thermal analysis (DTA). The HMF reduces the maximum and mean values of undercooling. Moreover, the HMF helps to stabilize the undercooling because the HMF suppresses the thermal convection. Furthermore, the nucleation rates are calculated by the statistical analysis of random nucleation events. The decrease in undercooling under the HMF is mainly attributed to the reduction of the contact angle, calculated by fitting the nucleation rates on the basis of the classical heterogeneous nucleation theory for spherical cap nuclei.