A long-period superlattice phase in Mg97Zn1Yb2 alloys synthesized under high-pressure. (August 2016)

• Record Type: Journal Article
• Authors: Matsushita, Masafumi; Inugai, Ryota; Yamasaki, Michiaki; Shinmei, Toru; Kawamura, Yoshihito; Irifune, Tetsuo; Fujita, Naoya; Abe, Eiji
• Is Part Of: Scripta materialia. Volume 121(2016)
• Page Start: 45
• Page End: 49
• Publication Date: 2016-08
• Subjects: Magnesium alloys -- Long-period structure -- High-pressure synthesis -- Valence fluctuations -- Scanning transmission electron microscopy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.04.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A novel long-period superlattice Mg77 Zn9 Yb14 phase, whose dimensions are described as √ 3 × √ 3 × 3 with respect to the original hexagonal close-packed Mg lattice, has been found in Mg97 Zn1 Yb2 alloys synthesized under high pressure (5 GPa) and at high temperature (723 K). A preliminary model structure is constructed based on atomic-resolution electron microscopy and first-principles calculations, providing local configurations around Yb atoms whose sizes appear to be smaller than those of a divalent Yb. This may be reasonably attributed to an applied high-pressure effect. Graphical abstract: A novel long-period superlattice (LPSL) Mg77 Zn9 Yb14 phase.