τ phase formation in a TiC+TiB2 composite bonded with a nickel based binder alloy

A. A. Ogwu, T. J. Davies

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Attempts to understand the formation mechanism and to inhibit formation of the embrittling τ-phase in a Ti-C-B-Ni system is reported. An initial dilatometric study and differential thermal analysis was carried out under an argon atmosphere. Qualitative scanning transmission electron microscopy (STEM) studies in the elemental mode was conducted to detect and identify phases on grain boundaries. Based on the three point bend strengths and the fracture toughness improvements, it is possible that the observed grain boundary phases are not an embrittling τ-phase. The τ-phase would have formed under equilibrium conditions, while other phases form preferentially under non-equilibrium conditions.

Original languageEnglish
Pages (from-to)1377-1380
Number of pages4
JournalScripta Materialia
Volume40
Issue number12
DOIs
Publication statusPublished - May 21 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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