Nano-quasicrystalline phase formation in Mg-Cd-Yb alloys

Alok Singh, R. Divakar, V. S. Raghunathan, J. Q. Guo, A. P. Tsai

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The microstructure of Mg60+xCd25-xYb15, x=0, 5, 10, Mg50Cd30Yb20 and Mg25Cd65Yb10 as-cast alloys has been examined by transmission electron microscopy. While the Mg60Cd25Yb15 alloy showed only an icosahedral quasicrystalline phase, the magnesium rich alloys also showed a Zn2Mg type (Mg, Cd)2Yb Laves phase. The alloys showed nanosized particles of icosahedral phase. Eutectic microstructures involving the icosahedral phase were observed. A lamellar (50 nm) structure of icosahedral phase and Mg was observed, exhibiting a definite orientation relationship with the hexagonal axis along one of the twofold axes of the icosahedral phase. In the Cd-rich alloys the cubic Cd6Yb approximant phase occurred, along with the icosahedral phase and intermediate structures in nanocrystalline form.

Original languageEnglish
Pages (from-to)261-264
Number of pages4
JournalJournal of Alloys and Compounds
Volume342
Issue number1-2
DOIs
Publication statusPublished - 2002 Aug 14
Externally publishedYes

Keywords

  • Nanostructures
  • Precipitation
  • Quasicrystals
  • Scanning and transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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