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Estimation of thermodynamic properties of Cu-La binary alloy with modified Miedema's theory
Li, Hai-hong; Zhang, Shi-hong; Chen, Yan; Cheng, Ming; Song, Hong-wu; Liu, Jin-song; shzhang@imr.ac.cn
2016
Source PublicationRUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
ISSN0036-0244
Volume90Issue:1Pages:11-17
AbstractAccording to modified Miedema's theory, mixing enthalpies (Delta H), excess entropies (S (E)), excess Gibbs free energy (G (E)), and component activities (a) of Cu-La binary alloy were estimated using the basic thermodynamic principles and some simple physical parameters of Cu and La, such as electronegativity, atomic volume and electron density. Based on the Cu-La binary alloy phase diagram, the Gibbs free energy of the phase precipitation reactions of Cu6La and Cu5La was deduced. The results showed that the values of Delta H, S (E), and G (E) of Cu-La binary alloy were all negative. Compared to the ideal solution, the activities of the components presented a large negative deviation from Raoult's law, which indicated that there was a strong interaction between Cu and La. The calculated data are well consistent with the experimental data. The Gibbs free energies of the phase precipitation reactions of Cu6La are lower than those for Cu5La, which means that Cu6La is thermodynamically more stable than Cu5La. Furthermore, the experimental results show that rareearth rich Cu6La phase particles in copper matrix are formed after La microalloying.
description.department[li, hai-hong] yantai univ, sch environm & mat engn, yantai 264005, peoples r china ; [li, hai-hong ; zhang, shi-hong ; chen, yan ; cheng, ming ; song, hong-wu ; liu, jin-song] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordCu-la Alloy Thermodynamics Activity Gibbs Free Energy Miedema's Theory
Funding OrganizationCAS Agenda to Provide S&T Support and Services for National Strategic Emerging Industries; Project of Shandong Province Higher Educational Science and Technology Program [J15LA52]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74832
Collection中国科学院金属研究所
Corresponding Authorshzhang@imr.ac.cn
Recommended Citation
GB/T 7714
Li, Hai-hong,Zhang, Shi-hong,Chen, Yan,et al. Estimation of thermodynamic properties of Cu-La binary alloy with modified Miedema's theory[J]. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A,2016,90(1):11-17.
APA Li, Hai-hong.,Zhang, Shi-hong.,Chen, Yan.,Cheng, Ming.,Song, Hong-wu.,...&shzhang@imr.ac.cn.(2016).Estimation of thermodynamic properties of Cu-La binary alloy with modified Miedema's theory.RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A,90(1),11-17.
MLA Li, Hai-hong,et al."Estimation of thermodynamic properties of Cu-La binary alloy with modified Miedema's theory".RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 90.1(2016):11-17.
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