A study of the Al-Pt-Ir phase diagram

B. Grushko, S. Samuha, L. Meshi

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Phase equilibria in Al-Pt-Ir were studied up to 50 at.% Al at 1100°C, up to 70at.% Al at 900°C and up to 75at.% Al at 810°C. At elevated temperatures the isostructural AlIr and high-temperature AlPt β-phases probably form a continuous compositional region. The ternary extensions of the phases Al4Pt, Al21Pt8, Al3Pt2 and low-temperature AlPt were revealed along approximately constant Al concentrations up to 15, 11, 20 and 10at.% Ir, respectively. The Al-Ir C-phase dissolved up to 12at.% Pt, and the χ-phase propagated up to almost Al3Pt. A new ternary B-phase (I41/acd, a=0.86250, c=2.18409nm) was revealed around Al69Pt7Ir24. Its structural model was derived from the electron diffraction data.

Original languageEnglish
Article number34471
Pages (from-to)873-878
Number of pages6
JournalJournal of Alloys and Compounds
Volume646
DOIs
StatePublished - 7 Jul 2015

Keywords

  • Crystal structure
  • Phase diagrams
  • Transition metal alloys and compounds

ASJC Scopus subject areas

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

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