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Spinodal decomposition in ternary alloys

✍ Scribed by J.J. Hoyt


Publisher
Elsevier Science
Year
1989
Weight
988 KB
Volume
37
Category
Article
ISSN
0001-6160

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✦ Synopsis


The Langer theory of spinodal decomposition in binary solutions is extended to the case of ternary alloys. A ternary master equation is obtained from which a system of diffusion equations in the Cahn-Hilliard approximation and equations of motion for the three independent partial structure functions are derived. The latter equations are presented with an approximation to various nonlinear terms and are expressed within the framework of the linear approximation due to Cook.

Rb&La

theotie de Langer de la decomposition spinodale dans les solutions binaires est &endue au cas des alliages temaires. On obtient une equation fondamentale temaire dont on deduit un systtme d'tquations de la diffusion dans l'approximation de Cahn et Hilliard, et un systeme d'bquations du mouvement pour les trois fonctions de structure partielles independantes. Ces demieres equations sont presentbes avec une approximation pour les differents termes non lineaires, et elles sont exprimees dans le cadre de l'approximation lineaire due a Cook.

Zusammenfassung-Die

Langer-Theorie der spinodalen Entmischung in binaren Mischkristallen wird auf den Fall temlrer Legierungen erweitert. Es ergibt sich eine temlre Hauptgleichung, von der aus Diffusionsgleichungen in der Niiherung von Cahn und Hilliard und Bewegungsgleichungen fur die drei unabhlngigen partialen Strukturfunktionen abgeleitet werden. Diese letzteren Gleichungen werden mit einer Naherung fiir verschiedene nichtlineare Terme dargestellt und ausgedriickt im Rahmen der linearen Naherung von Cook.


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