Effect of heat treatment on the decomposition of TiC–ZrC solid solutions by spark plasma sintering

Ying Li, Hirokazu Katsui, Takashi Goto

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

TiC–ZrC solid solutions at ZrC composition of 5–90 mol% were consolidated by spark plasma sintering of TiC and ZrC powders. The phase decomposition behavior by heat-treatment at 1273–2273 K was investigated. TiC–ZrC solid solutions with 10–70 mol% ZrC decomposed into TiC- and ZrC-rich phases after heat treatment at 1473–2273 K for 3.6 ks. The decomposition resulted in the formation of nodular structures several tens to hundreds nanometers in length with coherent crystal orientation relationship of the TiC-rich phase {100} // ZrC-rich phase {100}. The Vickers hardness and fracture toughness increased with increasing heat-treatment temperature and reached maximum values of 26 GPa and 3.0 MPa m1/2, respectively, for 80TiC–20ZrC heat treated at 1873 K.

Original languageEnglish
Pages (from-to)3795-3800
Number of pages6
JournalJournal of the European Ceramic Society
Volume36
Issue number15
DOIs
Publication statusPublished - 2016 Nov 1

Keywords

  • Mechanical property
  • Microstructure
  • Phase decomposition
  • Titanium carbide
  • Zirconium carbide

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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