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Etude par diffraction des rayons X de la formation d'une couche de laiton par dépôt d'une couche de cuivre et de zinc et diffusion

Abstract : In this study are presented X ray difftaction methods for thin film analysis. Thin brass coating deposited on steel cord are obtained by a sequential deposition of copper and zinc followed by diffusion, leading to an heterogeneous brass. Quantitative analysis is extended to heterogeneous materials. We show the importance of the layer heterogeneity in the calculation of phases quantities. The Houska's method allowing to know the profile of concentration by using X ray line profile analysis is improved. We formulate a new approach of resolution giving directly the solution without the use of trial and error technics. This new formalism is applied to study the phase transformation [beta]'-[alpha]and the homogenisation of the alpha phase which occur during the diffusion in brass. Profiles of concentration determined by this method agree with those given by STIMS or GDL. A new method(ro-ryis) developed to measure residual stresses either in thin films or in bulk materials. Stresses observed in the brass layer appear when the steel is quenched after the thermodiffusion. This study showst hat XRD connected with XRF allows to know rapidly with accuracy the main diffusion parameters as concentration phases composition, stresses and their evolution during the diffusion process used in steel cord making
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https://hal.univ-lorraine.fr/tel-01776858
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Bernard Bolle. Etude par diffraction des rayons X de la formation d'une couche de laiton par dépôt d'une couche de cuivre et de zinc et diffusion. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 1994. Français. ⟨NNT : 1994METZ063S⟩. ⟨tel-01776858⟩

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