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In vacuo production of alpha-AlB12, C4AlB24, AlB12C2 and Al3B48C2 powders

Lookup NU author(s): Dr Ahmet Koroglu, Emeritus Professor Derek Thompson

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Abstract

The production of pure powder samples of boron-rich ternary Al-B-C phases was investigated in vacuum at temperatures between 1400 degrees C and 1600 degrees C, using a range of different starting powders. Compacted powder mixes of B-AlB2-B4C, Al-B-C, Al-B-B4C, B-C-AlB2, B-AlB2 and Al-B were heated for 1-2 h under vacuum in a carbon resistance furnace and the products characterised by X-ray diffraction. It was found impossible to produce significant quantities of C4AlB24 under these conditions, but >95% pure samples of alpha-AlB12, AlB12C2 and Al3B48C2 were obtained. This study is a precursor to further research aimed at producing dense B4C-type materials which might offer the advantages of easier densification and fabrication as compared with B4C itself. (C) 2012 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Koroglu A, Thompson DP

Publication type: Article

Publication status: Published

Journal: Journal of the European Ceramic Society

Year: 2012

Volume: 32

Issue: 12

Pages: 3501-3507

Print publication date: 01/09/2012

ISSN (print): 0955-2219

ISSN (electronic): 1873-619X

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2012.04.032

DOI: 10.1016/j.jeurceramsoc.2012.04.032

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