Amorphous and quasi-crystalline phases in rapidly solidified MgAlZn alloys

Akio Niikura, Ampo Sai, Nobuyuki Nishiyama, Akihisa Inoue, Tsuyoshi Masumoto

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The formation of amorphous and icosahedral phases and approximants has been identified in rapidly solidified MgAlZn alloys. The icosahedral phase is located at the composition range between those of the amorphous phase and approximants. Mg40Al40Zn20 is a cubic 1 1 approximant in the equilibrium state and a cubic 5 3 rational approximant in the rapidly solidified state. Rapidly solidified Mg50Al30Zn20 and Mg50Al20Zn30 have a disordered icosahedral structure with a high density of random phason strain. The valence concentration e/a plays an important role in the selections of rapidly solidified structure between the amorphous and the icosahedral phases and of phason strains between isotropic and anisotropic.

Original languageEnglish
Pages (from-to)1387-1391
Number of pages5
JournalMaterials Science and Engineering A
Volume181-182
Issue numberC
DOIs
Publication statusPublished - 1994 May 15

ASJC Scopus subject areas

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

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