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Hydrogen in lanthanum-magnesium-nickel alloys with structures of the L22, D2 d , and L60 types

  • Theory of Metals
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Abstract

A statistical theory of the solubility of hydrogen in alloys with structures of the L22, D2 d , and L60 types and in phase mixtures of these alloys is developed. The isotherms of absorption and desorption have been studied; their dependence on the activity of hydrogen and concentration of magnesium has been established. It is shown that with an increase in the magnesium concentration and a decrease in the activity of hydrogen, a plateau (a horizontal segment) appears and is lengthened in the isotherms. Hysteresis effects have been investigated with allowance for volume effects; the hysteresis coefficients have been estimated. The decrease in the hysteresis coefficient with increasing magnesium concentration is substantiated. The results of the theoretical calculations are compared with experimental data.

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Authors and Affiliations

  1. Frantsevich Institute of Problems in Materials Science, National Academy of Sciences of Ukraine, ul. Krzhizhanovskogo 3, Kiev, 03142, Ukraine

    S. Yu. Zaginaichenko & D. V. Shchur

  2. Dnepropetrovsk National University, ul. Gagarina 72, Dnepropetrovsk, 49000, Ukraine

    Z. A. Matysina

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  1. S. Yu. Zaginaichenko
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  2. Z. A. Matysina
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  3. D. V. Shchur
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Original Russian Text © S.Yu. Zaginaichenko, Z.A. Matysina, D.V. Shchur, 2007, published in Fizika Metallov i Metallovedenie, 2007, Vol. 104, No. 5, pp. 453–464.

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Zaginaichenko, S.Y., Matysina, Z.A. & Shchur, D.V. Hydrogen in lanthanum-magnesium-nickel alloys with structures of the L22, D2 d , and L60 types. Phys. Metals Metallogr. 104, 435–446 (2007). https://doi.org/10.1134/S0031918X07110014

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  • DOI: https://doi.org/10.1134/S0031918X07110014

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