Face centered cubic and L12 two-phase structure of Ir-Nb-Zr alloys

Y. Yamabe-Mitarai, H. Harada

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The phase constitution of Ir-Nb-Zr alloys with a composition below 25 at% (Nb+Zr) was investigated by microstructure observation using scanning electron microscopy (SEM), composition analysis using electron probe microscopy analysis (EPMA), and phase identification using X-ray diffraction analysis (XRD). Partial isothermal sections of the Ir-Nb-Zr ternary system were determined at 1773, 2073, and 2373 K. It was found that the f.c.c. and L12 two-phase regions, which are shown in the Ir-Nb and Ir-Zr binary systems, were connected from the Ir-Nb side to the Ir-Zr side in the Ir-Nb-Zr ternary system. The potential of Ir-Nb-Zr alloys as high-temperature materials is discussed in terms of the microstructure and the lattice misfit between the f.c.c. and L12 phases.

Original languageEnglish
Pages (from-to)169-179
Number of pages11
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2003 Oct 27
Externally publishedYes


  • High-temperature alloys
  • Microstructure
  • Phase diagram
  • Transition metal alloys
  • X-ray diffraction

ASJC Scopus subject areas

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


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