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High-temperature ox...
High-temperature oxidation resistance of ternary and quaternary Cr-(Mo)-Si-B2-z coatings-Influence of Mo addition
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- Bahr, A. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.
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- Glechner, T. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.
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- Grimmer, A. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.
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- Wojcik, T. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.
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- Kutrowatz, P. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.
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- Podsednik, M. (författare)
- TU Wien, Inst Chem Technol & Analyt, A-1060 Vienna, Austria.
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- Limbeck, A. (författare)
- TU Wien, Inst Chem Technol & Analyt, A-1060 Vienna, Austria.
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- Heller, M. (författare)
- Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, D-91058 Erlangen, Germany.
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- Ramm, J. (författare)
- Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein.
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- Hunold, O. (författare)
- Oerlikon Surface Solut AG, Oerlikon Balzers, FL-9496 Balzers, Liechtenstein.
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- Kolozsvari, S. (författare)
- Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, D-91058 Erlangen, Germany.
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- Polcik, P. (författare)
- Plansee Composite Mat GmbH, D-86983 Lechbruck, Germany.
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- Ntemou, Eleni (författare)
- Uppsala universitet,Tillämpad kärnfysik
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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, D-91058 Erlangen, Germany.
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- Riedl, H. (författare)
- TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria.;TU Wien, Inst Mat Sci & Technol, A-1060 Vienna, Austria.
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TU Wien, Christian Doppler Lab Surface Engn high performanc, A-1060 Vienna, Austria TU Wien, Inst Chem Technol & Analyt, A-1060 Vienna, Austria. (creator_code:org_t)
- Elsevier, 2023
- 2023
- Engelska.
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Ingår i: Surface & Coatings Technology. - : Elsevier. - 0257-8972 .- 1879-3347. ; 468
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Si-based alloying of transition metal diborides is a promising strategy to improve their limited oxidation resistance in high-temperature environments. In this study, we investigate the oxidation resistance of ternary and quaternary Cr-(Mo)-Si-B2-z coatings sputter-deposited from alloyed CrB2/TMSi2 targets (TM = Cr, Mo). The asdeposited Cr-(Mo)-Si-B2-z coatings are stabilized in the single-phased hexagonal AlB2-structure, except the high-Si containing Cr0.26Mo0.11Si0.24B0.39 presenting amorphous character. The Mo-containing Cr-Mo-Si-B2-z films exhibit relatively high hardness compared to their ternary Cr-Si-B2-z counterparts, obtaining up to 26 GPa due to the formation of (Cr,Mo)B-2 solid solutions. The Si-alloying in ternary and quaternary coatings provides oxidation resistance up to 1200 degrees C, owing to the formation of highly protective double-layered scales consisting of SiO2 with a Cr2O3 layer on top, inhibiting oxygen inward diffusion. The quaternary Cr0.31Mo0.07Si0.15B0.47 coating is distinguished by superior oxidation resistance with lower porosity and void formation compared to the ternary Cr0.37Si0.16B0.47. Mo proved to be the key element for the higher stability and enhanced oxidation resistance due to the evolution of the MoSi2 phase at similar to 600 degrees C. This phase formation controls the Si diffusion and mobility within the microstructure, thus reducing the porosity and governing the Si supply to form SiO2 scale. The quaternary Cr0.31Mo0.07Si0.15B0.47 coating maintained an oxidation resistance up to 30 h at 1200 degrees C by forming a 2.5 mu m dense amorphous Si-based oxide scale with a thin Cr2O3 on top.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Chromium diboride
- Disilicides
- Sputtering
- Thin films
- Oxidation resistance
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Bahr, A.
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Glechner, T.
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Grimmer, A.
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Wojcik, T.
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Kutrowatz, P.
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Podsednik, M.
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visa fler...
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Limbeck, A.
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Heller, M.
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Ramm, J.
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Hunold, O.
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Kolozsvari, S.
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Polcik, P.
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Ntemou, Eleni
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Primetzhofer, Da ...
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Felfer, P.
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Riedl, H.
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
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Surface & Coatin ...
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Uppsala universitet