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    Effect of thermal processing on the tribology of nanocrystalline Ni/TiO2 coatings

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    Publication date
    2018
    Author
    Cooke, Kavian O.
    Khan, Tahir I.
    Keyword
    Nanocrystalline
    Co-electrodeposition
    Heat treatment
    Sliding wear
    Ni/TiO2 coatings
    Tribology
    Rights
    © 2018 The Authors. Published by Springer. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
    Peer-Reviewed
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    Abstract
    The tribological performance of a nanocrystalline coating is heavily influenced by its composition, morphology, and microstructural characteristics. This research work describes the effect of heat treatment temperature on the microstructural, morphological, and mechanical behavior of nanocrystalline Ni/TiO2 coatings produced by electrophoresis. The surface morphology and coating cross section were characterized by scanning electron microscopy (SEM). The composition of coatings and the percentage of TiO2 nanoparticles incorporated in the Ni matrix were studied and estimated by using an energy-dispersive spectroscopic (EDS) analysis, while x-ray diffractometry (XRD) was used to investigate the effect of heat treatment temperature on phase structure. The results showed agglomeration of TiO2 nanoparticles on the surface of the coating. The high hardness and wear resistance recorded for the as-deposited coating was attributed to the uniform distribution of TiO2 nanoparticle clusters throughout the cross section of the coating. Heat treatment of the Ni/TiO2 coatings to temperatures above 200 °C led to significant grain growth that changed the surface morphology of the coating and reduced the strengthening effects of the nanoparticles, thus causing a reduction in the hardness and wear resistance of the coatings.
    URI
    http://hdl.handle.net/10454/16613
    Version
    published version paper
    Citation
    Cooke KO and Khan TI (2018) Effect of thermal processing on the tribology of nanocrystalline Ni/TiO2 coatings. Emergent Materials. Online before print.
    Link to publisher’s version
    https://doi.org/10.1007/s42247-018-0015-z
    Type
    Article
    Collections
    Engineering and Informatics Publications

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