Microstructure, chemical reaction and mechanical properties of TiC/Si3N4 and TiN-coated TiC/Si3N4 composites

Jow-Lay Huang, Ming Tung Lee, Horng Hwa Lu, Ding Fwu Lii

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Silicon nitride containing various compositions of as-received TiC and TiN-coated TiC, were hot pressed at 1800°C for 1 h in a nitrogen atmosphere. In TiN-coated TiC/Si3N4 composites, TiC reacted first with the TiN coating to form a titanium carbonitride interlayer at 1450°C, which essentially reduced further reactions between TiC and Si3N4 and enhanced densification. TiN-coated TiC/Si3N4 composites exhibited better densification, hardness, flexural strength and fracture toughness than those of as-received TiC/Si3N4. The toughening mechanisms for as-received TiC/Si3N4 and TiN-coated TiC/Si3N4 composite were attributed to crack deflection, load transfer and crack impedence by the compressive thermal residual stress.

Original languageEnglish
Pages (from-to)4899-4906
Number of pages8
JournalJournal of Materials Science
Volume31
Issue number18
DOIs
Publication statusPublished - 1996 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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