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Influence of carbon deficiency on phase formation of super-hard TaCy thin films
TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 149, s. 150-154Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Using nonreactive sputter deposition allows the preparation of single-phase fcc structured TaCy thin films over a wide compositional range with y between 0.63 and 1.04. Among this composition range, the C-deficient TaC0.78 exhibits the highest as deposited hardness of 43.4 +/- 0.65 GPa combined with the highest thermal stability. Even after vacuum annealing to 2400 degrees C, no vacancy-ordered or faulted Ta-C based phases can be detected. The stabilization of carbon deficient fcc structured TaCy near y of about 0.75, revealed the decisive character of vacancy engineered thin films materials for ultra-high temperature applications. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
PERGAMON-ELSEVIER SCIENCE LTD , 2018. Vol. 149, s. 150-154
Emneord [en]
Ta-C, Thin films, Carbon vacancies, UHTC, Density Functional Theory (DFT)
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-352582DOI: 10.1016/j.scriptamat.2018.02.030ISI: 000429390500033OAI: oai:DiVA.org:uu-352582DiVA, id: diva2:1237092
Forskningsfinansiär
Swedish Foundation for Strategic Research Tilgjengelig fra: 2018-08-07 Laget: 2018-08-07 Sist oppdatert: 2018-08-07bibliografisk kontrollert

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Paneta, ValentinaPrimetzhofer, Daniel

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