Title

Mechanochemical synthesis of ReB2 powder

Authors

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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