Cailiao Baohu (Sep 2023)

Tribological Properties of Graphene Oxide Reinforced Carbon Fiber Phosphate Bonded Ceramic Coating at Different Temperatures

  • SI Shuai, BIAN Da, ZHAO Yongwu

DOI
https://doi.org/10.16577/j.issn.1001-1560.2023.0213
Journal volume & issue
Vol. 56, no. 9
pp. 63 – 67

Abstract

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To improve the interfacial performance of carbon fiber (CF) in phosphate bonded ceramic coating (PBCC) and enhance the wear resistance of PBCC at high temperature， electrophoretic deposition method was used to attach graphene oxide (GO) sheets to the surface of CF to prepare CF-GO hybrid fiber.The tribological behavior of PBCC with and without CF-GO hybrid fiber was studied at different temperatures.The surface morphology and structure of CF-GO samples were characterized by scanning electron microscopy (SEM) and Raman spectroscopy.The tribological properties of PBCC without and without CF-GO hybrid fibers at different temperatures were characterized by SEM， friction and wear tester and optical profilometer.Results showed that the friction coefficients of the coatings with and without 2%(mass fraction， the same below) CF-GO hybrid fiber increased with the increase of the ambient temperature from 25 ℃to 100 ℃，and the friction coefficient fluctuation value of the coating with hybrid fibers added was significantly lower than that of the coating without hybrid fibers added.The friction coefficient of PBCC with 2%CF-GO hybrid fiber added was lower than that of PBCC without hybrid fiber added at different temperatures.Therefore， it could be concluded that the addition of hybrid fiber effectively reduced the friction coefficient of the coating and the fluctuation value of the coefficient when the temperature of the friction condition increased， and improved stability of the tribological properties of the coating.The phosphate bonded ceramic coating with CF-GO hybrid fiber added at room temperature had a high wear rate，and PBCC without CF-GO hybrid fiber added at high temperature also had a high wear rate.From this， it could be seen that the addition of CF-GO hybrid fiber reduced the height of protrusions on both sides of coating wear marks at room temperature and reduced the wear resistance of the coating， while at high temperature，it increased the height of protrusions on both sides of coating wear marks and improved the wear resistance of the coating.

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