钨
状态方程
热力学
从头算
配分函数(量子场论)
材料科学
统计物理学
物理
量子力学
冶金
作者
Yue-Yue Tian,Bo-Yuan Ning,X. -D. Xiang,Huifen Zhang,Xi-Jing Ning
出处
期刊:Cornell University - arXiv
日期:2022-10-29
标识
DOI:10.48550/arxiv.2210.16736
摘要
Equation of state (EOS) for bcc tungsten at 300 K (or 3000 K) up to 1000 GPa (or 300 GPa) was predicted for the first time by solving the partition function via a direct integral approach (DIA) with ab initio calculations of the atoms' interactions. Compared with available experiments under static compressions up to 150 GPa (or 35 GPa) for room temperature (or 1673 K), all the calculated results are within the experimental uncertainty achieved very recently. Furthermore, the same procedure was performed to investigate the shock wave experiments on the EOS up to 400 GPa and 10000 K, and the calculated average pressure deviates the experimental measurements by only 2.0%. These facts suggest that the other calculated results of DIA for the EOS are reliable, and DIA as a universal method without any artificial parameters could be widely applied to predict EOS of various materials under various conditions.
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