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

Köroğlu A., Thompson D. P.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol.32, no.12, pp.3501-3507, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 12
  • Publication Date: 2012
  • Doi Number: 10.1016/j.jeurceramsoc.2012.04.032
  • Journal Name: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3501-3507
  • Keywords: Aluminium boron carbides, Powder-chemical preparation, Firing, X-ray methods, Borides, Armour, BORON-CARBIDE, CRYSTAL-STRUCTURE, CARBON-FIBER, ALUMINUM, COMPOSITES, AL8B4C7, SYSTEM
  • Ondokuz Mayıs University Affiliated: Yes

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.