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Substoichiometry an...
Substoichiometry and tantalum dependent thermal stability of alpha-structured W-Ta-B thin films
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- Moraes, V. (author)
- TU Wien, Inst Mat Sci & Technol, Christian Doppler Lab Applicat Oriented Coating D, A-1060 Vienna, Austria
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- Fuger, C. (author)
- TU Wien, Inst Mat Sci & Technol, Christian Doppler Lab Applicat Oriented Coating D, A-1060 Vienna, Austria
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- Paneta, Valentina (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Primetzhofer, Daniel (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Polcik, P. (author)
- Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany
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- Bolvardi, H. (author)
- Oerlikon Balzers Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein
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- Arndt, M. (author)
- Oerlikon Balzers Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein
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- Riedl, H. (author)
- TU Wien, Inst Mat Sci & Technol, Christian Doppler Lab Applicat Oriented Coating D, A-1060 Vienna, Austria;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria
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- Mayrhofer, P. H. (author)
- TU Wien, Inst Mat Sci & Technol, Christian Doppler Lab Applicat Oriented Coating D, A-1060 Vienna, Austria;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- English.
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In: Scripta Materialia. - : Elsevier BV. - 1359-6462 .- 1872-8456. ; 155, s. 5-10
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Physical vapor deposited (PVD) WB2 thin films crystallize in the alpha-AIB(2)-prototype structure rather than in their thermodynamically stable (omega-W2B5-z-prototype structure. Contrary to the majority of alpha-AlB2-type transition metal diborides (TMB2), alpha-WB2 exhibits a more ductile character. Combining density functional theory and sophisticated experiments, we show that the stability of alpha-WB2 thin films is basically influenced by point defects such as vacancies present in PVD materials. With the help of alpha-TaB2 (one of the most ductile TMB2 with high preference for alpha-AlB2-type), the thermally driven decomposition and phase transformation of alpha-W1-xTaxB2-z to the omega-W2B5-z-type can be shifted to temperatures above 1200 degrees C.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- W-Ta-B
- Thin films
- Boron vacancies
- Density functional theory (DFT)
- UHTC
Publication and Content Type
- ref (subject category)
- art (subject category)
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