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Preparation, proper...
Preparation, properties and high-temperature oxidation resistance of MoSi2-HfO2 composite coating to protect niobium using spent MoSi2-based materials
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- Zhu, Lu (författare)
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China; School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China
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- Wang, Xiaohong (författare)
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China
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- Ren, Xuanru (författare)
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China
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- Zhang, Ping (författare)
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China
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- Akhtar, Farid (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Feng, Peizhong (författare)
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China
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(creator_code:org_t)
- Elsevier, 2021
- 2021
- Engelska.
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Ingår i: Ceramics International. - : Elsevier. - 0272-8842 .- 1873-3956. ; 47:19, s. 27091-27099
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Industrial spent MoSi2-based materials and HfO2 were recycled as raw materials to fabricate MoSi2-HfO2 composite coating by spark plasma sintering (SPS). The microstructural evolution of the coatings was characterized and the 1500 °C oxidation behavior was explored. Cracks penetrated through the MoSi2 coating while no cracks can be found in the HfO2-containing composite coating owing to the reduction of the mismatch of thermal expansion coefficient (CTE). Good metallurgical bonding was exhibited since (Mo,Nb)5Si3 diffusion layer was found in the HfO2-containing coating by the diffusion of Nb and Si across the interface without gaps. After 1500 °C oxidation of 20 h, cracks appeared in the surface of SiO2 layer on MoSi2 coating while the HfO2-containing composite coating possessed crack-free oxide scale. HfSiO4 with high temperature (>2900 °C) is formed during oxidation and it inlays in the silica oxide scale to improve the stability. Compared to MoSi2 coating, Nb coated MoSi2-HfO2 has thinner oxide scale with lower mass gain during oxidation, thus presenting better high-temperature anti-oxidation properties.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Spent MoSi2-Based materials
- Composite coating
- HfO2
- Oxidation resistance
- Niobium
- Engineering Materials
- Materialteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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