Phase constituents of Ir-Nb-Pt-Al quaternary alloys

C. Huang, Y. Yamabe-Mitarai, K. Nishida, H. Harada

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The phase constituents of Ir-Nb-Pt-Al quaternary system were investigated using a combination of several methods. Two L12 phases (L1 2-Ir3Nb and L12-Pt3Al) were found to be miscible in this system, and a fully fcc/L12 two-phase structure was observed in all the alloys investigated. A partial isothermal phase diagram at 1500 °C was plotted. The lattice misfit between L1 2 and fcc phase was found to be small, and a fine two-phase structure could form at a certain heat-treatment temperature. The microstructure of Ir-Nb-Pt-Al quaternary alloys showed promising characteristics for the development of high-temperature materials.

Original languageEnglish
Pages (from-to)917-926
Number of pages10
Issue number9
Publication statusPublished - 2003 Sept 1
Externally publishedYes


  • A. Intermetallics, miscellaneous
  • B. Alloy design
  • B. Martensitic transformation
  • B. Phase diagram
  • B. Phase identification

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


Dive into the research topics of 'Phase constituents of Ir-Nb-Pt-Al quaternary alloys'. Together they form a unique fingerprint.

Cite this