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Phase relations in the LaB6-MoB2 system

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Abstract

LaB6-MoB2.2 alloys have been prepared at 2600°C in high-purity helium in a vacuum induction furnace. As found by microstructural analysis and x-ray diffraction, the components of this system form a eutectic. The microstructure of the eutectic has been studied. MoB2.2 is shown to undergo a transformation during cooling, with the precipitation of submicron-sized Mo2B5 and α-MoB particles. For this reason, its microhardness increases with an increase in the melting temperature of the alloys because the diffusion rate rises with temperature.

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Authors and Affiliations

  1. Kiev Polytechnical Institute (National Technical University), pr. Peremogi 37, Kiev, 03056, Ukraine

    P. I. Loboda, G. P. Kisla, I. I. Bogomol & M. A. Sysoev

  2. Kurdyumov Institute of Metal Physics, National Academy of Sciences of Ukraine, pr. Vernadskogo 36, Kiev, 03142, Ukraine

    O. P. Karasevskaya

Authors
  1. P. I. Loboda
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  2. G. P. Kisla
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  3. I. I. Bogomol
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  4. M. A. Sysoev
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  5. O. P. Karasevskaya
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Correspondence to G. P. Kisla.

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Original Russian Text © P.I. Loboda, G.P. Kisla, I.I. Bogomol, M.A. Sysoev, O.P. Karasevskaya, 2009, published in Neorganicheskie Materialy, 2009, Vol. 45, No. 3, pp. 288–291.

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Loboda, P.I., Kisla, G.P., Bogomol, I.I. et al. Phase relations in the LaB6-MoB2 system. Inorg Mater 45, 246–249 (2009). https://doi.org/10.1134/S0020168509030042

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  • DOI: https://doi.org/10.1134/S0020168509030042

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