Abstract
The paper addresses the problem of determining phase composition, composition of mixed phases, and the CSR size in structurally similar metal systems where the most part of similar reflections of two phases overlap with each other. The overall experimental diffraction profile of overlap** reflections is decomposed into components by simulation techniques. The profile of each individual reflection is calculated as the convolution of the broadening function (in the form of the Pearson VII distribution with refined parameters) and an instrumental doublet function that is measured on a reference substance with a sufficiently large CSR size, shifted by an appropriate angle, and adapted to this position. As a result, parameters of profile components were identified and further used to determine phase compositions and compositions of mixed phases in nonequilibrium systems Fe-Co and Ni-Cu as well as the dependence of the CSR size on system’s composition.
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The authors thank I. G. Dodonova and O. V. Vasiljeva for the synthesis of samples.
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Russian Text © The Author(s), 2020, published in Zhurnal Strukturnoi Khimii, 2020, Vol. 61, No. 6, pp. 1047–1054.
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Zakharov, Y.A., Pugachev, V.M., Korchuganova, K.A. et al. Analysis of Phase Composition and CSR Sizes in Non-Equilibrium Nanostructured Systems Fe-Co and Ni-Cu Using Diffraction Maxima Simulations in a Doublet Radiation. J Struct Chem 61, 994–1000 (2020). https://doi.org/10.1134/S0022476620060219
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DOI: https://doi.org/10.1134/S0022476620060219