Microstructures and mechanical properties of TiN-TiB2-Ti 5Si3 composites in-situ fabricated by spark plasma sintering

Jianfeng Zhang, Leifeng Liu, Lianjun Wang, Wan Jiang, Lidong Chen, Rong Tu, Takashi Goto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Various TiN-TiB2-Ti5Si3 composites have been synthesized via spark plasma sintering of Ti, BN and Si3N 4. The reaction process anlaysis indicates that Ti5Si 3 forms earlier than TiB2. The reaction heat as well as the Joule heat may prompt the melting of Ti5Si3, making it infiltrate into TiN and TiB2. Thus, the composites can be further densified with the in-situ addition of Ti5Si3. For TiN-TiB2-Ti5Si3 composites, the maximum fracture toughness was 4.5± 0.3 MPa·m1/2, and maximum flexural strength was 601.1± 28.5 MPa, which were both quite higher than those of TiN-TiB2 composites. The related toughening and strengthening mechanisms were proposed from microstructural analysis.

Original languageEnglish
Pages (from-to)1085-1088
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume117
Issue number1370
DOIs
Publication statusPublished - 2009 Oct

Keywords

  • Ceramic-matrix composites (CMCs)
  • Intermetallics
  • Mechanical properties
  • Spark plasma sintering
  • TiN-TiB-TiSi

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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