Low-temperature synthesis of group 4-8 transition metal carbides using lithium or sodium

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    Abstract

    TiC0.7 and Mo2C powders were prepared by heating Ti-C and Mo-C compacts and Li or Na at temperatures of 800-900 °pC for 12 h in an Ar atmosphere. These temperatures were 200-350 °C lower than those at which Ti and Mo fully reacted with C without the addition of Li or Na. The grain size of the TiC0.7 and Mo2C powders was close to that of the source metal powders. In the Tm-C systems (7m = Zr, V, Nb, Ta, Cr, and Mn), the addition of Li or Na to Tm-C compacts enhanced the formation of ZrC, VC, NbC, TaC, Cr7C3, and Mn23C6 at 800 °C. On the other hand, no effect was observed for the formation of carbides in the systems with Tm = Fe, Ru, Hf, W, and Re.

    Original languageEnglish
    Pages (from-to)652-660
    Number of pages9
    JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
    Volume59
    Issue number11
    DOIs
    Publication statusPublished - 2012 Nov 1

    Keywords

    • Alkali metals
    • Low-temperature synthesis
    • Metal carbides
    • Metal flux

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry

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