Correlative theoretical and experimental investigation of the formation of AIYB(14) and competing phases
2016 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 119, no 8, 085307- p.Article in journal (Refereed) PublishedText
The phase formation in the boron-rich section of the Al-Y-B system has been explored by a correlative theoretical and experimental research approach. The structure of coatings deposited via high power pulsed magnetron sputtering from a compound target was studied using elastic recoil detection analysis, electron energy loss spectroscopy spectrum imaging, as well as X-ray and electron diffraction data. The formation of AlYB14 together with the (Y,Al)B-6 impurity phase, containing 1.8 at. % less B than AlYB14, was observed at a growth temperature of 800 degrees C and hence 600 degrees C below the bulk synthesis temperature. Based on quantum mechanical calculations, we infer that minute compositional variations within the film may be responsible for the formation of both icosahedrally bonded AlYB14 and cubic (Y,Al)B-6 phases. These findings are relevant for synthesis attempts of all boron rich icosahedrally bonded compounds with the space group: Imma that form ternary phases at similar compositions. (C) 2016 AIP Publishing LLC.
Place, publisher, year, edition, pages
AMER INST PHYSICS , 2016. Vol. 119, no 8, 085307- p.
IdentifiersURN: urn:nbn:se:liu:diva-126840DOI: 10.1063/1.4942664ISI: 000371601800053OAI: oai:DiVA.org:liu-126840DiVA: diva2:917193
Funding Agencies|Deutsche Forschungsgemeinschaft within the Collaborative Research Center [SFB-TR 87/2]; JARA-HPC from RWTH Aachen University [JARA0131]; Knut and Alice Wallenberg Foundation2016-04-052016-04-052016-04-28