Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys

An Pang Tsai, Akihisa Inoue, Tsuyoshi Masumoto, Ho Sou Chen

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.

Original languageEnglish
Pages (from-to)L419-L422
JournalJapanese journal of applied physics
Volume31
Issue number4
DOIs
Publication statusPublished - 1992 Apr
Externally publishedYes

Keywords

  • Aluminum-palladium-manganese
  • Crystallization
  • Icosahedral phase
  • Ideal composition
  • Phason relaxation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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