• XIAOLONG JIA

      Articles written in Bulletin of Materials Science

    • Ultra-low friction and excellent elastic recovery of fullerene-like hydrogenated carbon film based on multilayer design

      YANSHUANG MENG XIAOLONG JIA FULIANG ZHU JUNYAN ZHANG

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      Multilayer fullerene-like hydrogenated carbon (FL-C:H) films were synthesized by using the chemical vapourdeposition technique with a different flow rate of methane. The typical fullerene-like structure of as-prepared films wasinvestigated by using transmission electron microscopy and Raman spectra. The prepared multilayered FL-C:H films showeda high elastic recovery ($\sim$90%), ultra-low friction coefficient ($\sim$0.019) and low wear rate ($\sim 3.0 \times 10^{−9}$ mm$^3$ Nm$^{−1}$) in humid air.

    • Surface micro-texturing design for improving tribological behaviour of graphene oxide thin films

      XIAOLONG JIA CHONG WANG GUANGQI XIONG FULIANG ZHU

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      Effect of micro-scale surface texture with different densities on wear resistance of graphene oxide (GO) films was studied using a revolving ball-on-flat tribometer in humid environments. The micro-scale surface texture was producedby depositing about 363 nm thick GO films onto silicon substrates pre-textured with the patterns of dimples. The goal of the surface patterning was to improve the wear resistance of the GO films so that to extend lubricating life. The experimental results demonstrated excellent ability of the textured films to improve wear resistance of the silicon substrate. Furthermore, the GO films with an appropriate dimple area density (4%) were effective in reducing the friction coefficient (0.024) and exhibiting outstanding wear resistance owing to the entrapment of wear particles in the dimples. Finally, a simple frictionmechanism model was drawn to explain the frictional properties of the different textured area density GO films.

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