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    Substrate controlled degradation rate of protective SiAlN coating via mitigating interfacial reaction

    Gao, Z, Liu, H, Kulczyk-Malecka, J ORCID logoORCID: https://orcid.org/0000-0002-4905-3635, Liu, C, Hu, D, Kelly, P ORCID logoORCID: https://orcid.org/0000-0003-1008-4941 and Xiao, P (2023) Substrate controlled degradation rate of protective SiAlN coating via mitigating interfacial reaction. Corrosion Science, 213. p. 111006. ISSN 0010-938X

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    Abstract

    The degradation rates of protective SiAlN coatings (0.9 µm thick) on pure Ti, Ti6Al4V, and Timetal 834 alloys in air at 800 °C were investigated and compared. The SiAlN coating on pure Ti was depleted and then formed a thin oxide scale after exposure of 50 h, whereas a 0.6 µm thick remnant SiAlN coating without any signs of oxidation was observed on Timetal 834. Interfacial reactions between SiAlN coatings and different substrates caused depletion of SiAlN, thereby determining the degradation rates of SiAlN coatings. The non-reactive alloying elements Sn and Al in Timetal 834 alloy could retard such interfacial reactions, thereby impeding coating degradation.

    Item Type: Article
    Peer-reviewed: Yes
    Date Deposited: 20 Feb 2023 11:25
    Publisher: Elsevier
    Additional Information: This is an Author Accepted Manuscript of an article published in Corrosion Science, published by and copyright Elsevier.
    Divisions: Faculties > Science and Engineering
    Research Centres > Advanced Materials and Surface Engineering
    Subject terms: 0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering, Energy
    Data Access Statement: Data will be made available on request.
    URI: https://e-space.mmu.ac.uk/id/eprint/631444
    DOI: https://doi.org/10.1016/j.corsci.2023.111006
    ISSN 0010-938X

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