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Influence of Ta on ...
Influence of Ta on the oxidation resistance of WB2-z coatings
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- Fuger, C. (författare)
- TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria.
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- Schwartz, B. (författare)
- TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria.
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- Wojcik, T. (författare)
- TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria.;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
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- Moraes, V (författare)
- TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
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- Weiss, M. (författare)
- TU Wien, Inst Chem Technol & Analyt, Vienna, Austria.
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- Limbeck, A. (författare)
- TU Wien, Inst Chem Technol & Analyt, Vienna, Austria.
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- Macauley, C. A. (författare)
- Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, Erlangen, Germany.;Interdisciplinary Ctr Nanostruct Films IZNF, D-91058 Erlangen, Germany.
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- Hunold, O. (författare)
- Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein.
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- Polcik, P. (författare)
- Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany.
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- Primetzhofer, Daniel (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Felfer, P. (författare)
- Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, Erlangen, Germany.
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- Mayrhofer, P. H. (författare)
- TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
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- Riedl, H. (författare)
- TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria.;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
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TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria TU Wien, Christian Doppler Lab Surface Engn High Performan, Vienna, Austria.;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria. (creator_code:org_t)
- Elsevier, 2021
- 2021
- Engelska.
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Ingår i: Journal of Alloys and Compounds. - : Elsevier. - 0925-8388 .- 1873-4669. ; 864
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Abstract
Ämnesord
Stäng
- Ternary W1-x TaxB2-z is a promising protective coating material possessing enhanced ductile character and phase stability compared to closely related binaries. Here, the oxidation resistance of W1-xTaxB2-z thin films was experimentally investigated at temperatures up to 700 degrees C. Ta alloying in sputter deposited WB2-z coatings led to decelerated oxide scale growth and a changed growth mode from paralinear to a more linear (but retarded) behavior with increasing Ta content. The corresponding rate constants decrease from k(p)* = 6.3.10(-4) mu m(2)/s for WB2-z to k(p)* = 1.1.10(-4) mu m(2)/s for W0.66Ta0.34B2-z as well as k(1) = 2.6.10(-5) mu m/s for TaB2-z, underlined by decreasing scale thicknesses ranging from 1170 nm (WB2-z), over 610 nm (W0.66Ta0.34B2-z) to 320 nm (TaB2-z) after 10 min at 700 degrees C. Dense and adherent scales exhibit an increased tantalum content (columnar oxides), which suppresses the volatile character of tungsten-rich as well as boron oxides, hence being a key-factor for enhanced oxidation resistance. Thus, adding Ta (in the range of x = 0.2-0.3) to a-structured WB2-z does not only positively influence the ductile character and thermal stability but also drastically increases the oxidation resistance.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Oxidation resistance
- Transition metal diborides
- Scale growth
- Diborides
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Fuger, C.
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Schwartz, B.
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Wojcik, T.
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Moraes, V
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Weiss, M.
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Limbeck, A.
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Macauley, C. A.
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Hunold, O.
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Polcik, P.
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Primetzhofer, Da ...
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Felfer, P.
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Mayrhofer, P. H.
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Riedl, H.
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Journal of Alloy ...
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Uppsala universitet