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X-ray diffraction investigation of bimetallic diffusion zones in the Cu-Pd system

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Abstract

A nondestructive X-ray diffraction technique was used to investigate the diffusion of 8β thick deposits of Pd into [100] oriented single crystals of Cu. The concentration profiles produced by isothermal diffusion at 900°C were determined by mathematical analyses of two diffracted intensity bands. The Boltzmann-Matano analysis was used to determine concentration dependent diffusion coefficients which were found to compare favorably with previously reported values. Also, X-ray rocking curves were made on selected compositions to determine the degree of diffusion-generated subgrain misorientation increase in the diffusion zones. These rocking curves were Gaussian in shape and indicated that the distribution of subgrain misorientations was Gaussian. The widths of the Gaussian misorientation functions were found to be directly related to the lattice parameter gradient existing in the specimen after diffusion. The results of this investigation are compared with those obtained from a previous examination of nearly identically prepared Cu-Ni specimens.

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Authors and Affiliations

  1. Metallurgical Engineering, Division of Minerals Engineering, Virginia Polytechnic Institute and State University, 2406, Blacksburg, Va

    Darrel R. Tenney (Assistant Professor)

  2. Aerospace Research Laboratory (ARL-LL), Metallurgy and Ceramics Research Laboratory, 45433, Wright-Patterson AFB, Ohio

    Patrick K. Talty (Research Metallurgist)

Authors
  1. Darrel R. Tenney
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  2. Patrick K. Talty
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Tenney, D.R., Talty, P.K. X-ray diffraction investigation of bimetallic diffusion zones in the Cu-Pd system. Metall Trans 5, 241–247 (1974). https://doi.org/10.1007/BF02642947

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