Phase equilibria in the Ir-rich portion of the Ir-Al-X (X: Ti, Zr and Hf) ternary systems

Seiji Miura, Kenji Ohkubo, Yoshihiro Terada, Yoshisato Kimura, Yoshinao Mishima, Yoko Yamabe-Mitarai, Hiroshi Harada, Tetsuo Mohri

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10 Citations (Scopus)


Isotherms of the Ir-rich portion of the Ir-Al-X (X: Ti, Zr, Hf) systems are presented. In all of the isotherms three-phase equilibrium is found and no ternary compound is observed. Solid solubility of each phase is confirmed by chemical analysis by wavelength dispersive X-ray spectroscopy (WDS). The direction of the solubility lobe of L12-Ir3X with Al addition is explained in terms of the nearest neighbor interactions. Liquidus surfaces are also established by taking into account the microstructure of as-cast alloys, differential thermal analysis (DTA) data, Ir-X binary phase diagrams reported previously and the phase equilibria of the Ir-Al binary system investigated in the present study.

Original languageEnglish
Pages (from-to)239-247
Number of pages9
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2005 May 3
Externally publishedYes


  • High temperature alloys
  • Intermetallics
  • Scanning electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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