Interdiffusion in the Ir-rich solid solutions of Ir-Pt, Ir-Rh, and Ir-Re binary alloys

Nobuaki Sekido, Akinori Hoshino, Masahiro Fukuzaki, Tomohiro Maruko, Yoko Yamabe-Mitarai

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7 Citations (Scopus)


Interdiffusivity in the Ir-rich solid solutions of Ir-X (X = Pt, Rh and Re) binary alloys was investigated in the temperature range of 2073-2373 K. The interdiffusion coefficients within the solute concentration range up to 10 at.% were evaluated through conventional diffusion-couple experiments. The composition dependence of the interdiffusion coefficient was negligible in the Ir-Rh and Ir-Re solid solutions. On the other hand, some composition dependence was evident in the interdiffusion coefficient of the Ir-Pt solid solution, which increased with increasing Pt content. In comparison with the tracer self-diffusivity of pure Ir, the interdiffusivity in the Ir-Rh and Ir-Pt solid solutions was higher, but that in Ir-Re was lower within the temperature range studied.

Original languageEnglish
Pages (from-to)219-225
Number of pages7
JournalJournal of Phase Equilibria and Diffusion
Issue number3
Publication statusPublished - 2011 Jun


  • Boltzmann-Matano analysis
  • diffusivity measurements
  • electron probe microanalysis (EPMA)
  • interdiffusion


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