Structural and chemical determination of the new nanolaminated carbide Mo2Ga2C from first principles and materials analysis
2015 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 99, 157-164 p.Article in journal (Refereed) Published
Following our recent discovery of a new nanolaminated carbide, Mo2Ga2C, we herein present a detailed structural and chemical analysis of this phase based on ab initio calculations, X-ray photoelectron spectroscopy, high resolution scanning transmission electron microscopy, and neutron powder diffraction. Calculations suggest an energetically and dynamically stable structure for C in the octahedral sites between the Mo layers, with Ga bilayers - stacked in a simple hexagonal arrangement - between the Mo2C layers. The predicted elastic properties are below those of the related nanolaminate Mo2GaC. The predicted structure, including lattice parameters and atomic positions, is experimentally confirmed. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2015. Vol. 99, 157-164 p.
First principles; Phase stability; Nanolaminated material; Crystal structure; Mo2Ga2C
IdentifiersURN: urn:nbn:se:liu:diva-122193DOI: 10.1016/j.actamat.2015.07.063ISI: 000362145400017OAI: oai:DiVA.org:liu-122193DiVA: diva2:865059
Funding Agencies|Swedish Research Council [621-2011-4420, 642-2013-8020, 621-2014-4890]; Swedish Foundation for Strategic Research through the Synergy Grant FUNCASE Functional Carbides for Advanced Surface Engineering; Future Research Leaders 5 Program; ERC ; Knut and Alice Wallenberg Foundation2015-10-262015-10-232016-08-31