Refinement of the Al-rich part of the Al–Cu–Re phase diagram and atomic model of the ternary Al6.2Cu2Re phase

S. Samuha, B. Grushko, L. Meshi

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Abstract

Partial isothermal sections at 800, 650 and 590 °C were constructed for an Al-rich compositional range of Al–Cu–Re. The maximal solubility of Cu in the Al11Re4, h-Al4Re and l-Al4Re phases was found to be ∼6, 4.5, and 2.3 at% respectively, while the solubility of Re in the Al–Cu θ, η1and ε2phases was below 0.5 at%. Below 740 °C, a ternary hexagonal phase (P63, a = 1.1029 and c = 1.2746 nm) is formed in a small compositional range close to Al65Cu25Re10. Its structural model was deduced by direct methods applied on the precession electron diffraction tomography data.

Original languageEnglish
Pages (from-to)18-24
Number of pages7
JournalJournal of Alloys and Compounds
Volume670
DOIs
StatePublished - 1 Jan 2016

Keywords

  • Crystal structure
  • Electron diffraction
  • Metals and alloys
  • Phase diagrams

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