固体二元合金热迁移的精确唯象理论

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-03-04 DOI:10.1080/09500839.2020.1871088

I. Belova, Zi-kui Liu, G. Murch

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引用次数: 1

摘要

摘要在本文中，我们研究了二元合金在温度梯度（热迁移）中的扩散行为理论。利用不可逆热力学的Onsager形式，我们在稳态条件下，在空位处于局部平衡的情况下，根据各种可测量的扩散量，建立了每个组分的输运热的精确关系。指出了与一些早期工作明显不一致的地方。然后，根据Darken和Manning近似的随机合金模型，进一步发展了输送热的关系。还发展了运输热的形式分离关系。

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Exact phenomenological theory for thermotransport in a solid binary alloy

ABSTRACT In this paper, we study the theory of the diffusion behaviour of a binary alloy in a temperature gradient (thermotransport). Using the Onsager formalism of irreversible thermodynamics we develop exact relations for the heats of transport of each component in terms of various measurable diffusion quantities under steady state conditions and with the vacancies being at local equilibrium. Apparent inconsistencies with some earlier work are indicated. Further relations for heats of transport are then developed in terms of the random alloy model for the Darken and Manning approximations. Relations for the formal separation of the heats of transport are also developed.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.