Stability and compression behaviour of icosahedral Zn-Mg-y quasicrystal under high pressures up to 70 GPa

M. Hasegawa, A. P. Tsai, T. Yagi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The stability of an icosahedral Zn55Mg35Y10quasicrystal has been investigated under uniaxial high pressures up to 70 GPa by means of an in-situ angle-dispersive X-ray powder diffraction method using synchrotron radiation and diamond anvil cell. The icosahedral structure of the Zn55Mg35Y10quasicrystal is found to be essentially stable under high pressures up to 70 GPa. It is found that no anisotropy of the pressure dependence of d/d0can be distinguished for each index, indicating isotropic compression of the quasicrystal. The zero-pressure bulk modulus and its pressure derivative are calculated to be 73 ± 1 GPa and Bq = 3.6 ± 0.1 respectively. This indicates that the icosahedral Zn55Mg35Y10quasicrystal as well as the icosahedral Al60Li30Cu10quasicrystal, both of which are of Zn-Mg-Al type, is more compressible than icosahedral Al-transition metal type quasicrystals reported so far. The sample recovered from 70 GPa is essentially of quasicrystal structure and estimated to have about 0.73% residual strain.

Original languageEnglish
Pages (from-to)1769-1778
Number of pages10
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume80
Issue number8
DOIs
Publication statusPublished - 2000 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

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