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X-ray studies on phase equilibria in {Tm, Lu} - W - B ternary systems at 1070 K

  • Physicochemical And Structural Investigations Of Materials
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Abstract

Isothermal sections at 1070 K have been constructed by x-ray diffraction applied to the phase diagrams in the Tm - W - B and Lu - W - B systems. The solubility of “WB2” in TmB2 is low, while that in LuB2 attains 0.15 molar fraction (lattice parameters of the (Lu, W) B2 phase with a limiting composition and having the AlB2 structure a=0.31772(6), c=0.35804(9) nm). The distinct boride reported previously Tm3WB7 is confirmed (Er3CrB7 structure type). New ternary compounds have been identified and examined by powder method (DRON-3M diffractometer): TmWB4 (space group Pbam, structure type YCrB4, a=0.59989(2), b=1.15866(4), c=0.35821(1) nm, Nhkl=157, R=0.0796) and Lu2WB6 (Pbam, structure type Y2ReB6, a=0.91339(4), b=1.14865(5), c=0.35124(2) nm, Nhkl=408, R=0.0981).

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Authors and Affiliations

  1. Ivan Franko L’vov State University, USSR

    N. F. Chaban, S. I. Mikhalenko & Yu. B. Kuz’ma

Authors
  1. N. F. Chaban
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  2. S. I. Mikhalenko
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  3. Yu. B. Kuz’ma
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Translated from Poroshkovaya Metallurgiya, Nos. 5–6(413), pp. 43–48, May–June, 2000.

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Chaban, N.F., Mikhalenko, S.I. & Kuz’ma, Y.B. X-ray studies on phase equilibria in {Tm, Lu} - W - B ternary systems at 1070 K. Powder Metall Met Ceram 39, 251–255 (2000). https://doi.org/10.1007/BF02684675

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