High temperature strength of Ir/Ir2Y two phase alloys in the Ir-Pt-Y system

Nobuaki Sekido, Yoko Yamabe-Mitarai

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Possibilities of heat resistant alloys based on a C15 Laves phase and an FCC phase have been examined in the Ir-Pt-Y ternary system. Although the Ir solid solution phase (A1) and the Ir2Y phase (C15) are not in equilibrium in the Ir-Y binary system, this equilibrium is attained by small Pt additions to the binary system. High temperature compressive strength of an A1/C15 monovariant eutectic alloy was found to be much lower than that of Ir-15Nb, an Ir based γ/γ' alloy. Low strength of the present alloys is attributed to the absence of effective strengthening mechanisms that operate in the A1 phase; for Y is hardly dissolved within the A1 phase, by which solution hardening and precipitation hardening are not available.

Original languageEnglish
Title of host publicationPRICM7
PublisherTrans Tech Publications Ltd
Number of pages4
ISBN (Print)0878492550, 9780878492558
Publication statusPublished - 2010
Externally publishedYes
Event7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, Australia
Duration: 2010 Aug 22010 Aug 6

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Other7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
CityCairns, QLD


  • High temperature strength
  • Iridium
  • Laves phase
  • Transmission electron microscopy

ASJC Scopus subject areas

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

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