Sintering of SiC/Ti3SiC2 composites with high SiC contents

B. Chahhou, J. Roger

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The SPS reactive sintering of SiC/Ti3SiC2 composites with high SiC contents was studied by adding SiC to reactive (2TiC+1Ti+1.2Si+0.2Al) or (3TiC+2.2Si+0.2Al) mixtures. Four final volume percentages of SiC were targeted: 21 %, 50 %, 60 % and 70 % by adding the appropriate amounts of a micro-sized SiC powder to the reactive mixtures. The synthesis and the sintering of SiC/Ti3SiC2 composites were realized at 1500 °C/15 min/50 MPa from these mixtures. Due to liquid losses and SiO volatilization, the silicon lack was proven to be a significant limitation in the synthesis of Ti3SiC2 + nSiC composites. A deleterious effect of SiC additions was evidenced on both the reaction and the densification. Finally, Ti3SiC2 + nSiC composites were successfully obtained up to 50 vol% and 60 vol% of SiC from the (2TiC+1Ti+1.2Si+0.2Al) and (3TiC+2.2Si+0.2Al) mixtures, respectively. The thermodynamic calculations showed that the driving force of formation of SiC was very high which could disturb the syntheses from the (3TiC+2.2Si+0.2Al) mixture.

Original languageEnglish
Pages (from-to)7314-7325
Number of pages12
JournalJournal of the European Ceramic Society
Volume43
Issue number16
DOIs
StatePublished - Dec 2023
Externally publishedYes

Keywords

  • Composites
  • SiC
  • Sintering
  • Thermodynamic calculations
  • TiSiC

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