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Interaction of the TAl2–xNix (T = Zr, Hf) Laves Phases with Hydrogen

  • STRUCTURAL MATERIALS RESEARCH
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Powder Metallurgy and Metal Ceramics Aims and scope

The effect of hydrogen treatment on the phase composition and structure of the Laves phases in the Zr (Hf)–Ni–Al systems has been studied. It is found that grinding in a planetary-ball mill leads to partial glass formation in the alloys, the Laves phases have nanocrystallites ≈ 6–14 nm in size, and a phase transition takes place in the HfAl1.4Ni0.6 alloy. The nanocrystallites of the Laves phases refine with increasing grinding time. It is shown that interaction of the as-cast alloys with hydrogen at 3.0 MPa and 950°C finishes with their homogenization and formation of additional phases, such as Zr2Al3 and Zr6Ni8Al15, for the zirconium alloys. Besides the starting phase of MgCu2 structural type, a phase with MgZn2 structure appears in the hafnium alloys. The ball-milled zirconium alloys partially oxidize after the heat treatment in hydrogen.

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Authors and Affiliations

  1. Ivan Franko National University of Lviv, Lviv, Ukraine

    O. V. Shved & S. I. Mudry

  2. Karpenko Physicomechanical Institute, National Academy of Sciences of Ukraine, Lviv, Ukraine

    I. I. Bulyk, I. V. Borukh & O. P. Kononiuk

Authors
  1. O. V. Shved
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  2. I. I. Bulyk
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  3. S. I. Mudry
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  4. I. V. Borukh
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  5. O. P. Kononiuk
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Corresponding author

Correspondence to O. V. Shved.

Additional information

Translated from Poroshkova Metallurgiya, Vol. 57, Nos. 9–10 (523), pp. 137–146, 2018.

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Shved, O.V., Bulyk, I.I., Mudry, S.I. et al. Interaction of the TAl2–xNix (T = Zr, Hf) Laves Phases with Hydrogen. Powder Metall Met Ceram 57, 605–612 (2019). https://doi.org/10.1007/s11106-019-00022-x

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  • DOI: https://doi.org/10.1007/s11106-019-00022-x

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