CALPHAD modeling of molar volume

CALPHAD modeling of molar volume
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摩尔体积的 CALPHAD 建模

DOI:
10.1007/s11434-014-0218-5
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发表时间:
2014-03
影响因子:
--
通讯作者:
He Yanlin, Lu Xiaogang, Zhu Naqiong,
He Yanlin, Lu Xiaogang, Zhu Naqiong,
中科院分区:
--
文献类型:
--
作者:
He Yanlin, Lu Xiaogang, Zhu Naqiong,

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关于材料基本物理性质的数据库,如摩尔体积、密度、热膨胀系数、弹性常数、导热系数等,是材料设计基础知识的重要组成部分。热力学数据库提供化学驱动力和相平衡数据,而物理性质数据库提供基本物理参数,例如体积、晶格常数、晶格失配、弹性能、界面能等,用于相变和微观结构模拟。基于相图计算(CALPHAD)方法建立的物性数据库与热力学数据库相结合,可用于计算多组分、多相材料体系及组成相的物性、相平衡、相分数、相组成和热力学性质。在本文中,我们将详细讨论各种体积模型的基础上的CALPHAD方法,能够描述实验数据在很宽的范围内,从低温到熔点,从大气压到高压的纯物质以及多组分和多相材料。
Databases concerning basic physical properties of materials, such as molar volume, density, thermal expansion coefficient, elastic constants, thermal conductivity, etc., are essential parts of the underlying knowledge for materials design. While thermodynamic databases provide chemical driving forces and phase equilibrium data, physical property databases provide essential physical parameters, such as volume, lattice constant, lattice misfit, elastic energy, interfacial energy, etc., for phase transformation and microstructure simulations. Combined with thermodynamic databases, physical property databases established on the basis of the calculation of phase diagram (CALPHAD) method can be used to calculate physical properties together with phase equilibria, phase fractions, phase compositions, and thermodynamic properties for multi-component and multi-phase material systems and for the constituent phases. In this paper, we will discuss in detail various volume models based on the CALPHAD method which are capable of describing experimental data in a wide range from cryogenic temperatures to melting points, from the atmospheric pressure to high pressures for pure substances as well as multi-component and multi-phase materials.
DOI: 10.1016/j.calphad.2005.04.001
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