Matrix Description of Some Thermodynamic Properties of Multicomponent Alloys in Explicit Form

Abstract:

A matrix method for description of some thermodynamic properties in multicomponent alloys in explicit form has been proposed. It has been found that the method for determining thermodynamic properties from the cross-section data allows to find the contribution of short-range ordering into the thermodynamic state of an imperfect alloy. Diffusion processes in alloys are formed both from purely kinetic migrations of particles and from the system's thermodynamic properties. A consequence of this fact is that the diffusion coefficients D in all systems except for perfect solid solutions include to factors being D = Lg , the second one is the thermodynamic factor directly related to the system's chemical potential. However direct experimental separation of these factors can easily be performed in binary systems only while in triple systems in is highly difficult let alone multicomponent systems. Experimental evaluation of the factors in multicomponent systems from short-range order's parameters [1] would allow to establish a relation between the system's thermodynamic properties which is highly important for further progress in multicomponent diffusion theory and for practical applications.

• Periodical: Defect and Diffusion Forum (Volume 268)
• Pages: 51-58
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.268.51
• Online since: November 2007
• Authors: L.I. Erokhin
• Keywords: Activity Coefficient, Blending Energy, Thermodynamic Factor

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DOI: 10.1016/s0040-6031(02)00490-2