高温高压下液态铁的状态方程  

The equation of state for liquid iron at high pressure and temperature

作　　者：张清 吴少白 周亮亮 刘勋 黄海军[1] ZHANG Qing;WU Shao-Bai;ZHOU Liang-Liang;LIU Xun;HUANG Hai-Jun(School of Sciences,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学理学院,武汉430070

出　　处：《原子与分子物理学报》2023年第4期110-114,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(41874103)。

摘　　要：基于高温高压下面心立方(FCC)铁的状态方程和熔化温度实验数据,建立了热力学模型计算FCC铁、固-液混合相、液态铁在高温高压下的状态方程.在相同密度和温度下,计算的FCC铁、固-液混合铁、液态铁的压强与实验测量结果较为一致,且计算结果与实验结果平均偏差分别为-1.61 GPa、1.05 GPa、-0.05 GPa.在0~100 GPa压强范围内,当铁完全发生熔化时,随着压强的增大其密度变化由-7.5%下降至2.7%.Based on the measurements of equation of state and melting temperature for FCC iron at high pressure and temperature,the equations of states along solidus,liquidus,mixture of solid-liquid states,and liquid iron were calculated.Under the same temperature and density,the calculated pressures are consistent with experimental results,and the mean deviations between calculated results and experimental data are-1.61 GPa,1.05 GPa,-0.05 GPa.Due to the melting effect,the fractional density between liquid iron and fcc iron decreases from 7.5%to 2.7%with pressure within 100 GPa.

关 键 词：高温高压 状态方程 FCC铁 液态铁 

分 类 号：O521[理学—高压高温物理]