Spark plasma sintering of B4C-SiC composites


Sahin F. , APAK B. , AKIN İ. , KANBUR H. E. , GENCKAN D. H. , TURAN A., ...More

Solid State Sciences, vol.14, no.11-12, pp.1660-1663, 2012 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Abstract
  • Volume: 14 Issue: 11-12
  • Publication Date: 2012
  • Doi Number: 10.1016/j.solidstatesciences.2012.05.037
  • Title of Journal : Solid State Sciences
  • Page Numbers: pp.1660-1663
  • Keywords: Spark plasma sintering, X-ray methods, B4C, SiC, Microstructure final, MECHANICAL-PROPERTIES, MICROSTRUCTURE, CARBIDE, STRENGTH, B4C

Abstract

B4C-SiC composites were produced using spark plasma sintering (SPS) both reactively from B4C-SiO2-C starting powders and directly from B4C-SiC at 1700 and 1750 °C under a pressure of 40 MPa. Densification, microstructure and mechanical properties of B 4C-SiC composites were investigated. 98.8% relative density was obtained with the addition of Y2O3 in directly spark plasma sintered sample containing 10% SiC at 1750 °C for 5 min. In reactive spark plasma sintering, increasing SiC content resulted in a decrease in density because of the oxidation of SiC to SiO gas phase. The glassy phases formed with Y2O3 addition caused the Vickers hardness values to increase. SiC phase showed a homogenous dispersion in B4C matrix. © 2012 Elsevier Masson SAS. All rights reserved.