Solid-liquid interface energy of metals at melting point and undercooled state
Solid-liquid interface energy of metals at melting point and undercooled state
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DOI：
10.2320/matertrans.43.721
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发表时间：
2002-04-01
影响因子：
1.2
通讯作者：
Jie, WQ
中科院分区：
文献类型：
--
作者：
Jian, ZY;Kuribayashi, K;Jie, WQ
通过研究固液原子的构型熵、振动熵和结合强度对固液界面结构的影响，建立了粗糙固液界面能模型。由该模型计算出金属在熔点时的无量纲固液界面能为0.66-0.73，与晶界法的实验结果（0.66-0.75）基本一致。固液界面能随着过冷度的增加而减小。在金属所达到的最大过冷度下，由本模型预测的无量纲固液界面能为0.52-0.56。与形核过冷度法的实验结果（0.49-0.57）比较接近。在熔点和过冷度下，本模型对金属固液界面能的预测结果与实验结果符合得很好。
By investigating the effects of the configurational entropy, the vibrational entropy and the bonding strength of solid-liquid atoms on the structure of solid-liquid interface, a model for the interface energy of rough solid-liquid interface has been developed. From present model, the non-dimensional solid-liquid interface energies for metals at melting point are predicted to be 0.66-0.73, which are almost equal to the experimental result (0.66-0.75) obtained from grain boundary method. The solid-liquid interface energy decreases with increasing undercooling. At the maximum undercoolings that metals have reached, the non-dimensional solid-liquid interface energies predicted from present model are equal to 0.52-0.56. They are near to the experimental results (0.49-0.57) obtained from nucleation undercooling method, The predicted results of solid-liquid interface energy for metals from present model are in very good agreement with the experimentally measured results at melting point and undercooled state.