Mechanochemical synthesis of ReB2 powder

    Authors

    N. Orlovskaya; Z. L. Xie; M. Klimov; H. Heinrich; D. Restrepo; R. Blair;C. Suryanarayana

    Comments

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    Abbreviated Journal Title

    J. Mater. Res.

    Keywords

    SUPERHARD RHENIUM DIBORIDE; AMBIENT-PRESSURE; TIB2 POWDERS; ZRB2; Materials Science, Multidisciplinary

    Abstract

    ReB2 was recently reported to exhibit high hardness and low compressibility, which both are strong functions of its stoichiometry, namely Re to B ratio. Most of the techniques used for ReB2 synthesis reported 1:2.5 Re to B ratio because of the loss of the B during high temperature synthesis. However, as a result of B excess, the amorphous boron, located along the grain boundaries of polycrystalline ReB2, would degrade the ReB2 properties. Therefore, techniques which could allow synthesizing the stoichiometric ReB2 preferably at room temperature are in high demand. Here, we report synthesis of ReB2 powders using mechanochemical route by milling elemental crystalline Re and amorphous B powders in the SPEX 8000 high-energy ball mill for 80 h. The formation of boron and perrhenic acids are also reported after ReB2 powder was exposed to the moist air environment for a 12-month period of time.

    Journal Title

    Journal of Materials Research

    Volume

    26

    Issue/Number

    21

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    2772

    Last Page

    2779

    WOS Identifier

    WOS:000299873300013

    ISSN

    0884-2914

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