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Vacuum-thermal preparation of yttrium and gadolinium borides, and some of their properties

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Summary

  1. 1.

    The authors have studied the conditions for obtaining yttrium and gadolinium borides by vacuum-thermal reduction of yttrium and gadolinium oxides by the reaction MeO+2B→MeB+BO. Methods have been developed for obtaining YB4, YB6, GdB4, and GdB6 with chemical and phase compositions close to those required by the formulas

  2. 2.

    When the borides are obtained by this reaction, YB4 and GdB4 are stable in vacuum at all temperatures. Single-phase YB6 and GdB6 are obtained at 1600–1700°. At higher temperatures the hexa-borides decompose, giving tetraborides and boron (which volatilizes). Single-phase YB12 is obtained at 1600–1700°. At higher temperatures it decomposes with formation of YB6 and then YB4.

  3. 3.

    A hypothetical phase diagram of Gd-B is proposed. Data are given on individual properties of phases in the systems Y-B and Gd-B.

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Authors and Affiliations

  1. Moscow Institute of Steel and Alloys, USSR

    R. M. Manelis, G. A. Meerson, N. N. Zhuravlev, T. M. Telyukova, A. A. Stepanova & N. V. Gramm

Authors
  1. R. M. Manelis
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  2. G. A. Meerson
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  3. N. N. Zhuravlev
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  4. T. M. Telyukova
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  5. A. A. Stepanova
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  6. N. V. Gramm
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Additional information

Translated from Poroshkovaya Metallurgiya, No. 11(47), pp. 77–84, November, 1966.

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Manelis, R.M., Meerson, G.A., Zhuravlev, N.N. et al. Vacuum-thermal preparation of yttrium and gadolinium borides, and some of their properties. Powder Metall Met Ceram 5, 904–909 (1966). https://doi.org/10.1007/BF00775505

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  • DOI: https://doi.org/10.1007/BF00775505

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