New polytypes of long-period stacking ordered structures in a near-equilibrium Mg97Zn1Y2 alloy

Q. Q. Jin, X. H. Shao*, Xiaobing Hu, Z. Z. Peng, X. L. Ma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.

Original languageEnglish (US)
Pages (from-to)180-187
Number of pages8
JournalPhilosophical Magazine Letters
Volume97
Issue number5
DOIs
StatePublished - May 4 2017

Keywords

  • Magnesium alloys
  • electron diffraction
  • long-period stacking ordered (LPSO) structure
  • scanning transmission electron microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

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