Plasma sprayed α-Al2O3 main phase coating using γ-Al2O3 powders

Although α-Al 2 O 3 is commonly used as crude materials for preparing Al 2 O 3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al 2 O 3 crystalline phase with relatively poor mechanical performance. In this research, we employed an unconventional way, i.e. adopting low-cost...

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Published inSurface engineering Vol. 35; no. 9; pp. 801 - 808
Main Authors Niu, Bolong, Qiang, Li, Zhang, Junyan, Zhang, Fan, Hu, Yong, Chen, Wei, Liang, Aimin
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 02.09.2019
SAGE Publications
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ISSN0267-0844
1743-2944
DOI10.1080/02670844.2018.1499175

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Abstract Although α-Al 2 O 3 is commonly used as crude materials for preparing Al 2 O 3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al 2 O 3 crystalline phase with relatively poor mechanical performance. In this research, we employed an unconventional way, i.e. adopting low-cost γ-Al 2 O 3 powders as crude material via the optimisation of plasma spraying process to prepare a novel aluminium oxide coating containing α-Al 2 O 3 crystals with excellent mechanical properties as main phase, and the microstructure, microhardness and tribological properties of the coating were characterised and analysed. The results indicated that the aluminium oxide coating possesses favourable toughness, strength and wear resistance (e.g. HV602.4 and wear loss ∼2.5 μm), consequently having a great potential for exploration and application.
AbstractList Although α-Al 2 O 3 is commonly used as crude materials for preparing Al 2 O 3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al 2 O 3 crystalline phase with relatively poor mechanical performance. In this research, we employed an unconventional way, i.e. adopting low-cost γ-Al 2 O 3 powders as crude material via the optimisation of plasma spraying process to prepare a novel aluminium oxide coating containing α-Al 2 O 3 crystals with excellent mechanical properties as main phase, and the microstructure, microhardness and tribological properties of the coating were characterised and analysed. The results indicated that the aluminium oxide coating possesses favourable toughness, strength and wear resistance (e.g. HV602.4 and wear loss ∼2.5 μm), consequently having a great potential for exploration and application.
Although α-Al2O3 is commonly used as crude materials for preparing Al2O3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al2O3 crystalline phase with relatively poor mechanical performance. In this research, we employed an unconventional way, i.e. adopting low-cost γ-Al2O3 powders as crude material via the optimisation of plasma spraying process to prepare a novel aluminium oxide coating containing α-Al2O3 crystals with excellent mechanical properties as main phase, and the microstructure, microhardness and tribological properties of the coating were characterised and analysed. The results indicated that the aluminium oxide coating possesses favourable toughness, strength and wear resistance (e.g. HV602.4 and wear loss ∼2.5 μm), consequently having a great potential for exploration and application.
Author Hu, Yong
Chen, Wei
Zhang, Junyan
Qiang, Li
Liang, Aimin
Niu, Bolong
Zhang, Fan
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Copyright 2018 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute 2018
2018 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute
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Keywords γ-Al2O3
alumina coating
plasma spraying
wear resistance
α-Al2O3
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Snippet Although α-Al 2 O 3 is commonly used as crude materials for preparing Al 2 O 3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al 2 O...
Although α-Al2O3 is commonly used as crude materials for preparing Al2O3 coating by plasma spraying, the obtained coatings are mainly made up of γ-Al2O3...
SourceID sage
informaworld
SourceType Publisher
StartPage 801
SubjectTerms alumina coating
plasma spraying
wear resistance
α-Al
γ-Al
Title Plasma sprayed α-Al2O3 main phase coating using γ-Al2O3 powders
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