Thermodynamic modeling of the Pb-U and Pb-Pu systems

Thermodynamic modeling of the Pb-U and Pb-Pu systems
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Pb-U 和 Pb-Pu 系统的热力学建模

DOI:
10.1016/j.jnucmat.2010.02.002
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发表时间:
2010-08
影响因子:
3.1
通讯作者:
李志圣
李志圣
中科院分区:
工程技术2区
文献类型:
--
作者:
刘兴军;王翠萍;李志圣

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根据热力学性质和相平衡实验数据,采用相图计算方法对Pb-U和Pb-Pu二元体系进行了热力学计算。用Redlich-Kister方程描述了液相、bcc、fcc、(αU)、(βU)、(δ′Pu)、(γPu)、(βPu)和(αPu)相的Gibbs自由能,用双子格模型描述了金属间化合物(Pb 3U、PbU、PbPu 3、Pb 3 Pu 5、Pb 4Pu 5、Pb 5 Pu 4、α Pb 2 Pu、β Pb 2 Pu和Pb 3 Pu)的Gibbs自由能。对两个二元体系的热力学参数进行了优化,使之与现有的实验数据一致。
The thermodynamic assessments of the Pb–U and Pb–Pu binary systems were carried out using the CALPHAD (calculation of phase diagrams) method based on experimental data for thermodynamic properties and phase equilibria. The Gibbs free energies of the liquid, bcc, fcc, (αU), (βU), (δ′Pu), (γPu), (βPu) and (αPu) phases were described by a subregular solution model with the Redlich–Kister equation, and those of the intermetallic compounds (Pb3U, PbU, PbPu3, Pb3Pu5, Pb4Pu5, Pb5Pu4, αPb2Pu, βPb2Pu and Pb3Pu) by a two-sublattice model. The thermodynamic parameters for the two binary systems were optimized to consistently reproduce the available experimental data with satisfactory agreement.
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