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Specific features of the hydrogen-induced discrete (jumplike) structural evolution in Pd-Ta-H and Pd-Mo-H alloys

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Abstract

The nonmonotonic structural evolution observed in Pd-Ta-H and Pd-Mo-H hydrogenated alloys is shown to be discrete (jumplike) in character, which is due to the thermodynamic potential having a multivalley fractal structure in reciprocal space. This structure arises in the initial state and is fairly stable. Transformations occur as a result of hopping of the system between the long-lived states corresponding to local minima of the thermodynamic potential at both stages of rapid degassing and of stochastic oscillations of the centroids of diffraction maxima. The jumps are associated with the migration of hydrogen atoms and vacancies between the matrix and defect complexes and are accompanied by an increase or a decrease in the diffraction angles.

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Authors and Affiliations

  1. Moscow State University, Leninskie gory, Moscow, 119992, Russia

    V. M. Avdyukhina, A. A. Anishchenko, A. A. Katsnel’son & G. P. Revkevich

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  1. V. M. Avdyukhina
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  2. A. A. Anishchenko
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  3. A. A. Katsnel’son
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  4. G. P. Revkevich
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__________

Translated from Fizika Tverdogo Tela, Vol. 47, No. 3, 2005, pp. 387–394.

Original Russian Text Copyright © 2005 by Avdyukhina, Anishchenko, Katsnel’son, Revkevich.

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Avdyukhina, V.M., Anishchenko, A.A., Katsnel’son, A.A. et al. Specific features of the hydrogen-induced discrete (jumplike) structural evolution in Pd-Ta-H and Pd-Mo-H alloys. Phys. Solid State 47, 397–404 (2005). https://doi.org/10.1134/1.1884695

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