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Article Dans Une Revue Philosophical Magazine Année : 2007

Phenomenological coefficients in a dilute BCC alloy for the dumbbell mechanism

Résumé

The Self-Consistent Mean Field Method is applied to calculate the transport coefficients in a dilute BCC alloy with the dumbbell diffusion mechanism. A first degree of approximation (first shell) of the SCMF formalism coincides with the formerly derived pair association method, and a second degree of approximation (second shell) leads to a more accurate analytical formulation. The SCMF results are compared with other formalisms as well as existing and new Monte Carlo simulations, including a solute-dumbbell binding energy. This theory shows a good balance between accuracy and maniability in the investigated systems, and a simple criterium is proposed for the preferential use of the first and second shell approximations.

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Dates et versions

hal-00513747 , version 1 (01-09-2010)

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Vincent Barbe, Maylise Nastar. Phenomenological coefficients in a dilute BCC alloy for the dumbbell mechanism. Philosophical Magazine, 2007, 87 (11), pp.1649-1669. ⟨10.1080/14786430600917223⟩. ⟨hal-00513747⟩
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