EFFECTS OF STOICHIOMETRY ON BORON CARBIDE PRODUCTION VIA SELF PROPAGATING HIGH TEMPERATURE SYNTHESIS

ALKAN M., Derin C. B., Sönmez M. Ş., Yücel O.

Symposium on Extraction and Processing Division held at the TMS 2009 Annual Meeting and Exhibition, San-Francisco, Costa Rica, 15 - 19 February 2009, pp.703-704, (Full Text) identifier identifier

  • Publication Type: Conference Paper / Full Text
  • City: San-Francisco
  • Country: Costa Rica
  • Page Numbers: pp.703-704
  • Keywords: Boron Carbide, SHS, HCl Leaching
  • Dokuz Eylül University Affiliated: No

Abstract

In this study, a self-propagating high-temperature synthesis (SHS) and following acid leaching techniques were carried Out to produce boron carbide (B4C) powder. First, B2O3 was obtained through calcinations of H3BO3 at 1073 K for 2 hours. Then, the glassy B2O3 obtained was crushed and sieved. In the SHS experiments, different amounts of B2O3, Mg and C black were used. The SHS product was obtained in the forni of black, spongy solid. In the leaching step, the SHS product was leached in a HCl solution to eliminate the MgO and Mg3B2O6. The effect of acid concentration on the selective leaching was studied at different concentration range, solid/liquid (S/L) ratio, and temperature. The products obtained were characterized by using Xray diffraction, chemical analysis and SEM techniques