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纳秒尺度金属熔化相变数值模拟及实验验证
引用本文:张世来,刘福生,彭小娟,张明建,李永宏,马小娟,薛学东. 纳秒尺度金属熔化相变数值模拟及实验验证[J]. 物理学报, 2011, 60(1): 14401-014401
作者姓名:张世来  刘福生  彭小娟  张明建  李永宏  马小娟  薛学东
作者单位:西南交通大学高压物理实验室,成都 610031
基金项目:国家自然科学基金 (批准号:10874141)资助的课题.
摘    要:本文基于非均匀成核相变动力学理论和热传导方程研究了在极快速升温(1012K/s)条件下金属达到过热状态后发生熔化相变时,通过金属/光学窗口界面温度的演化历史研究了金属内部温度的变化情况.分析结果表明,当金属内部无熔化发生时,界面温度将很快达到平衡,此变化满足理想接触界面模型;而当金属内部有熔化发生时,界面温度受熔化速率的影响不能立即达到平衡而是经历了一个下降的弛豫过程.计算结果与实验观测结果进行比较后发现两者符合得较好,由此可以获得金属在高压下的熔化速率,熔化温度等相关信息.本文的研关键词:相变动力学热传导金属铁冲击波

关 键 词:相变动力学  热传导  金属铁  冲击波
收稿时间:2010-03-16
修稿时间:2010-05-06

Transformation kinetics of metal and experimental measurement at nanosecond order
Zhang Shi-Lai,Liu Fu-Sheng,Peng Xiao-Juan,Zhang Ming-Jian,Li Yong-Hong,Ma Xiao-Juan,Xue Xue-Dong. Transformation kinetics of metal and experimental measurement at nanosecond order[J]. Acta Physica Sinica, 2011, 60(1): 14401-014401
Authors:Zhang Shi-Lai  Liu Fu-Sheng  Peng Xiao-Juan  Zhang Ming-Jian  Li Yong-Hong  Ma Xiao-Juan  Xue Xue-Dong
Affiliation:Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China;Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031,China
Abstract:This paper reports the temperature relaxation process at melting iron/sapphire interface under shock compression, and interpretes the phenomenon basing on transformation kinetics and heat conduction equation. Analysis shows that if iron keeps melting, the history of interface temperature is affected by the melting speed. The interface temperature undergoes a slow cooling process when the melting speed of iron is finite, which is different from the result of previous researches. Simulation signal can be made accord ant with the experimental signal by adjusting some parameters. It was found that the melting temperature and melting speed of iron at high pressure can be dctermined by researching the relaxation process. So, this paper shows a new theoretical method and its experimental verification.
Keywords:transformation kinetics  heat conduction  iron  shock wave
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