New approximant phases in Al-Cr-Fe

V. Demange*, J. S. Wu, V. Brien, F. Machizaud, J. M. Dubois

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Recently, new approximant phases were pointed out in the Al-Cr-Fe system, namely orthorhombic O-Al-Cr-Fe, hexagonal H-Al-Cr-Fe and monoclinic M-Al-Cr-Fe. In the corresponding analyzed samples, the new approximant phases were always coexisting with metallic aluminum. We have studied the Al-Cr-Fe system within a broad composition range. In one alloy with composition Al81Cr11Fe8, two new crystalline approximants of the decagonal phase were discovered. These phases were analyzed by differential thermal analysis (DTA), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and microprobe analysis. The phases were found to be isomorphic with a C3,I-phase earlier discovered by Van Tendeloo et al. in Al-Mn-Ni and an O1-phase earlier discovered by Dong et al. in Al-Cr-Cu-Fe. Moreover, we have found in the same sample the O-Al-Cr-Fe phase as well as metallic aluminum.

Original languageEnglish (US)
Pages (from-to)79-81
Number of pages3
JournalMaterials Science and Engineering A
Volume294-296
DOIs
StatePublished - Dec 15 2000

ASJC Scopus subject areas

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

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