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.

摘要

在本文中，我们研究了二元合金在温度梯度（热传输）中的扩散行为理论。使用不可逆热力学的Onsager形式主义，我们根据稳态条件下各种可测量的扩散量以及空位处于局部平衡时，得出了每种组分的传输热的精确关系。指出与某些早期工作存在明显矛盾。然后，根据Darken和Manning近似的随机合金模型，进一步发展了运输热的关系。还建立了运输热正式分离的关系。