Contribution à l'étude des propriétés électroniques d'alliages métalliques liquides, métal noble-polyvalent, métal de transition-polyvalent :

Abstract : In the present work we determine experimentally the electronic properties (resistivity and absolute thermoelectric power of metallic liquid alloys Cu-Pb and Mn-Sn. The theorical interpretation is in the frame work of Faber-Ziman theory. A new resistivity and TEP simultaneous measure cell has been elaborated. It is based on the fact that since the works of Roberts (1985), the tungsten can be taken as reference electrode for the TEP. Our attention has been fixed on the Cu-Pb system which presents a miscibility gap. Our aim was to determine if the presence of gap has an influence on electronic properties above the miscibility curve. We have studied the influence Bhatia-Thornton partials interference functions SNN and Snc which has been measured by neutron diffraction with the isotonic substitution method. The theoretical interpretation of the TEP of metallic ally can be realized according to the Faber-Ziman theory. The TEP is expressed as a function of energy dependent phase shifts. Anormal concentration dependence of the temperature coefficient of the resistivity and of the thermopower indicate some premonition of the phase separation. If we take into account the Bhatia-Thornton experimental interference functions, we improve considerably by resistivity calculation. Computation of TEP by using the energy dependence contribution the calculated TEP very new to the experimental one
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Cheikh Chaïb. Contribution à l'étude des propriétés électroniques d'alliages métalliques liquides, métal noble-polyvalent, métal de transition-polyvalent :. Autre. Université Paul Verlaine - Metz, 1987. Français. ⟨NNT : 1987METZ008S⟩. ⟨tel-01775722⟩

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