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


Alkan M., Derin B. , Sonmez S., 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 identifier

  • Publication Type: Conference Paper / Full Text
  • City: San-Francisco
  • Country: Costa Rica
  • Page Numbers: pp.703-704

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