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Microstructure and tribological behavior of self-lubricating (Si:N)-DLC/MAO coatings on AZ80 magnesium substrate

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The combined micro arc oxidation (MAO) and a hybrid beam deposition process was used to deposit duplex (Si:N)-DLC/MAO coatings on AZ80 magnesium alloy. The microstructure and composition of the duplex coatings were analyzed by Raman spectroscopy, X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM) and atomic force microscopy (AFM). Tribological behaviors of the coatings were studied by ball-on-disk friction test. It was found that the ID/IG ratio of the (Si:N)-DLC (diamond-like carbon) top films increases with decreasing C2H2/N2 ratio. The (Si:N)-DLC top film with Si3N4 was formed on the MAO coated sample as the C2H2/N2 ratio was 10sccm:5sccm, which showed an increasing critical load compared with the pure DLC directly deposited on the Mg alloy substrate. As a result, the (Si:N)-DLC/MAO coating exhibited an advanced wear protection for the substrate.

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Authors and Affiliations

  1. School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an, 710032, China

    Wei Yang

  2. Ningbo key laboratory of Marine Protection Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Wei Yang, Dong Zhang, Peiling Ke & Aiying Wang

  3. Department of Prosthodontics, School & Hospital of Stomatology, Wenzhou Medical College, Wenzhou, 325027, China

    Zhennan Deng

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  1. Wei Yang
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  2. Zhennan Deng
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  3. Dong Zhang
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  4. Peiling Ke
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  5. Aiying Wang
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Correspondence to Aiying Wang.

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Yang, W., Deng, Z., Zhang, D. et al. Microstructure and tribological behavior of self-lubricating (Si:N)-DLC/MAO coatings on AZ80 magnesium substrate. ACTA METALL SIN 26, 693–698 (2013). https://doi.org/10.1007/s40195-013-0265-y

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  • DOI: https://doi.org/10.1007/s40195-013-0265-y

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