Formation of quasicrystalline phases in Al-rich Al-Mn-Be alloys

H. J. Chang, E. Fleury, G. S. Song, W. T. Kim, D. H. Kim

Research output: Contribution to journalConference article

17 Citations (Scopus)

Abstract

The effect of Be addition on the formation of quasicrystalline phases in Al-rich Al-Mn(-Be) alloys has been investigated. A metastable icosahedral quasicrystalline phase was found to form in a 93.5Al-5Mn-1.5Be (in wt%) alloy prepared by a conventional casting technique, indicating that the addition of Be to Al-Mn alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Be alloys forms in the undercooled melt with the equilibrium growth morphology of the pentagonal dodecahedron. Heat treatment at 540 °C for 100 h results in the precipitation of small platelets of a two-dimensional quasiperiodic phase in the α-Al matrix. These precipitates have an orientation relationship with the α-Al matrix.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume334-335
DOIs
Publication statusPublished - 2004 Mar 15
Event8th International Conference on Quasicrystals - Bangalore, India
Duration: 2002 Sep 82002 Sep 13

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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