Spark plasma sintering of TiN-TiB2 composites

Mettaya Kitiwan, Akihiko Ito, Takashi Goto

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

TiN-TiB2 composites were fabricated by spark plasma sintering at 1773-2573K. Effects of TiN and TiB2 content on relative density, microstructure, and mechanical properties were investigated. Above 2373K, TiN-TiB2 composites exhibited relative densities over 95%. A high density of 99.7% was obtained at 2573K with 20-30vol% TiB2. Shrinkage of the TiN-70vol% TiB2 composite was the highest at 1573-2473K. For the TiN-70vol% TiB2 composite prepared at 1973-2373K, TiN grains were small, while at 2573K, TiB2 became a continuous matrix, in which irregular-shaped TiN dispersed. hBN was formed in the TiN-TiB2 composite containing 50-60vol% TiB2 above 2373K. The maximum Vickers hardness and fracture toughness obtained for the TiN-80vol% TiB2 composite sintered at 2473K was 26.3GPa and 4.5MPa m1/2, respectively.

Original languageEnglish
Pages (from-to)197-203
Number of pages7
JournalJournal of the European Ceramic Society
Volume34
Issue number2
DOIs
Publication statusPublished - 2014 Feb 1

Keywords

  • Spark plasma sintering
  • Titanium diboride
  • Titanium nitride

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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