In-situ formation of Ti3SiC2 interphase in SiCf/SiC composites by molten salt synthesis

Jinsong Yang, Fang Ye, Laifei Cheng

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Titanium silicon carbide (Ti3SiC2) film was synthesized by molten salt synthesis route of titanium and silicon powder based on polymer-derived SiC fibre substrate. The pre-deposited pyrolytic carbon (PyC) coating on the fibre was utilized as the template and a reactant for Ti3SiC2 film. The morphology, microstructure and composition of the film product were characterized. Two Ti3SiC2 layers form the whole film, where the Ti3SiC2 grains have different features. The synthesis mechanism has been discussed from the thickness of PyC and the batching ratio of mixed powder respectively. Finally, the obtained Ti3SiC2 film was utilized as interphase to prepare the SiC fibre reinforced SiC matrix composites (SiCf/Ti3SiC2/SiC composites). The flexural strength (σF) and fracture toughness (KIC) of the SiCf/Ti3SiC2/SiC composite is 460 ± 20 MPa and 16.8 ± 2.4 MPa∙m1/2 respectively.

Original languageEnglish
Pages (from-to)1197-1207
Number of pages11
JournalJournal of the European Ceramic Society
Volume42
Issue number4
DOIs
StatePublished - Apr 2022

Keywords

  • CMCs-SiC
  • Molten salt synthesis
  • SiC Fibre
  • TiSiC interphase

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