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Effects of hBN Content on the Microstructure and Properties of Atmospheric Plasma-Sprayed NiCr/Cr3C2-hBN Composite Coatings

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Abstract

NiCr/Cr3C2-hBN composite coatings with different contents of hBN were prepared by atmospheric plasma-spray technology. The microstructural, mechanical, and tribological properties of the coatings were systematically investigated. The results show that the flowability and apparent density of NiCr/Cr3C2-hBN composite powders, as well as the microhardness and tensile strength of the NiCr/Cr3C2-hBN composite coating, gradually decrease with the increase of hBN in the composite powders. The addition of hBN is benefit to the friction coefficient of the coatings, but it is positive to the wear rate. When the content of hBN is up to 20%, the friction coefficient of the composite coating is lowest, but the wear rate of the composite coating is highest.

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Acknowledgment

The experiments and analysis of this work were completed at the Institute of Process Engineering, Chinese Academy of Sciences. And this work was supported by the National Science Foundation of China (Grant No. 51001093), National Science Foundation of Hebei Provence, China (E2015105068), and Science and Technology Plans of Tangshan (15130258a).

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  1. Department of Environmental and Chemical Engineering, Tangshan College, Tangshan, 063000, China

    Yuxia Cao

  2. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Yuxia Cao

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Cao, Y. Effects of hBN Content on the Microstructure and Properties of Atmospheric Plasma-Sprayed NiCr/Cr3C2-hBN Composite Coatings. J Therm Spray Tech 25, 650–659 (2016). https://doi.org/10.1007/s11666-016-0385-9

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  • DOI: https://doi.org/10.1007/s11666-016-0385-9

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