Structure of a novel Mg-rich complex compound in Mg–Co–Y ternary alloys. (15th March 2015)

• Record Type: Journal Article
• Authors: Egami, M.; Abe, E.
• Is Part Of: Scripta materialia. Volume 98(2015)
• Page Start: 64
• Page End: 67
• Publication Date: 2015-03-15
• Subjects: Magnesium alloys -- Intermetallic compound -- Crystal structure -- Electron microscopy -- First-principles calculations; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.11.013
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : We have determined the structure of a novel intermetallic compound formed in Mg–Co–Y alloys, based on scanning transmission electron microscopy observations and first-principles calculations. The ternary compound forms as stoichiometric Mg30 Co2 Y9 with a large hexagonal lattice ( P 63 / mmc, a = 10.2 Å, c = 22.4 Å), and its structure is characterized by an ordered arrangement of the Co2 Y9 clusters embedded in a Mg matrix. The energetically optimized Mg30 Co2 Y9 structure appears to be highly stable with a dense-packing (73.2%) of constituent atoms.