Effect of carbon content on the formation of Ti3SiC2 in the liquid silicon infiltration process

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

In the present work, Ti3SiC2-based composite was fabricated by pressureless infiltrating TiC-C preform with liquid silicon. The effect of carbon content on the phase composition and microstructure is studied, and then the reaction path of forming Ti3SiC2 in the liquid silicon infiltration (LSI) process is discussed. The existence of carbon is beneficial to the formation of Ti3SiC2, and Ti3SiC2 only appears in the sample with enough carbon content owing to the direct reaction between silicon melt and carbon. In the LSI process, silicon melt firstly reacts with TiC to form TiSi2 and SiC, and then Ti-Sinch eutectic is formed by dissolving the intermediate phase TiSi2 in silicon melt. Finally, Ti3SiC2 is formed by the reaction between Ti-Sinch eutectic and TiC with the existence of carbon.

Original languageEnglish
Title of host publicationHigh Temperature Ceramic Matrix Composites 8
Publisherwiley
Pages501-507
Number of pages7
ISBN (Electronic)9781118932995
ISBN (Print)9781118932988
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Carbon content
  • Liquid silicon infiltration
  • Oxidation resistance
  • Pressureless infiltrating
  • Thermal conductivity

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