Phase chemistry in the Ti-Si-N system: Thermochemical review with phase stability diagrams

S. Sambisivan, William Petuskey

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

The phase chemistry and thermodynamics of the Ti-Si-N system are reviewed leading to a revision of the ternary phase diagram at 1273 K to include the extended compositional ranges of S-TiN8 and Ti5Si3(Ny) and the compounds TSi, Ti5Si4, and a:-Ti. This same information is presented in the form of phase stability diagrams which plot the stability criteria for each phase as a function of thermodynamic activity of one component and the relative composition of the other two components. Plots in terms of log #si vs Ti/(Ti + N), log aN2 vs Si/(Ti + Si), and log an vs N/(Si + N) were constructed. All diagrams are consistent with current knowledge of phase compatibility and, therefore, are topologically correct. Further refinement will be possible as more accurate information on thermodynamics and compositional limits of solid solutions becomes available.

Original languageEnglish (US)
Pages (from-to)2362-2369
Number of pages8
JournalJournal of Materials Research
Volume9
Issue number9
DOIs
StatePublished - 1994

ASJC Scopus subject areas

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

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