Formation mechanism of tetrahedral MgYNi4 phase

Wenjie Song, Jinshan Li, Tiebang Zhang, Xiaojiang Hou, Hongchao Kou

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A tetrahedral MgYNi4 phase is prepared by melting method, and then formation mechanism associated with three-dimensional (3D) morphology is proposed. The tetrahedral MgYNi4 crystal is enclosed by four closed-packed {111} planes, arising from the 4-fold rotoinversion symmetry of MgYNi4 structure. The secondary arms grow along <110> directions between four primary trunks. The {111} lamellas grow from secondary arms to face center and shape up a tetrahedral skeleton with hollows. As {111} lamellas grow, the skeleton can be filled up and the perfect tetrahedral MgYNi4 is formed.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalMaterials Letters
Volume145
DOIs
StatePublished - 15 Apr 2015

Keywords

  • Crystal growth
  • Electron probe microanalysis (EPMA)
  • Hydrogen storage
  • Solidification
  • Tetrahedron

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