Characterization of Sintered Boron Suboxide with Nickel Compounds

Conference proceedings article

Authors / Editors

Ogunmuyiwa, Enoch

Research Areas

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Publication Details

Author list: Johnson OT, Ogunmuyiwa EN, Sigalas I, Afolabi AS

Place: HONG KONG

Publication year: 2015

Journal: WORLD CONGRESS ON ENGINEERING 2009, VOLS I AND II (2078-0958)

Journal acronym: LECT NOTES ENG COMP

Start page: 752

End page: 756

Number of pages: 5

ISBN: 978-988-14047-0-1

ISSN: 2078-0958

Languages: English-Great Britain (EN-GB)

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Abstract

Although B6O materials have shown excellent potentials for wear resistant and cutting tool applications, the problem of low fracture toughness and the difficulties to densify has delayed the application of B6O materials in the industry. In this work, efforts have been directed towards improving the fracture toughness and densification of these materials by incorporating suitable secondary phases and tailoring the microstructure to the desired properties. Synthesized B6O was hot pressed at 1850 degrees C and 80 MPa in an argon environment, with nickel compounds (nickel (Ni) and nickel oxide (NiO)). The addition of 1.10 vol.% of additives improved the densification of the B6O powders in comparison to the pure B6O material. The fracture mode observed in the sintered materials is mainly transgranular.

Keywords

Boron suboxide, Fracture toughness, superhard materials

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