Abstract Epoxy resin (EP) composite coatings enhanced with hexagonal boron nitride (HBN) nano-sheets, TiO2 particles and HBN-TiO2 hybrid material were fabricated successfully on the surface of 304L stainless steel. The structural and morphological features of HBN, TiO2 and HBN-TiO2 hybrid obtained from mechanical peeling and sol-gel method were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), Raman spectroscopy, XRD patterns, FT-IR spectra and XPS spectra. Moreover, tribological characteristic of composite coatings was investigated by UMT-3 tribometer. Mechanical behavior, worn surface, steel ball surface and debris size distribution of composite coatings were detected to investigate the tribological mechanism. The results demonstrated that HBN/EP, TiO2/EP and HBN-TiO2/EP composite coatings showed remarked promotion of mechanical behavior compared with the neat EP, especially for the improvement of hardness. The HBN-TiO2/EP composite coating, whose wear rate decreased by 65.8 % in comparison with the neat EP, manifested prominent tribological performance ascribed to the load carrying capacity of TiO2 and the reduction of self-lubricating effect on the size of debris.

中文翻译：

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HBN 纳米片和 TiO2 的耦合杂化以提高复合涂层的机械和摩擦学性能

摘要 在304L不锈钢表面成功制备了六方氮化硼(HBN)纳米片、TiO2颗粒和HBN-TiO2杂化材料增强的环氧树脂(EP)复合涂层。通过机械剥离和溶胶-凝胶法获得的 HBN、TiO2 和 HBN-TiO2 杂化物的结构和形态特征通过扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM)、拉曼光谱、XRD 图案、FT-IR 光谱进行表征和 XPS 光谱。此外，通过UMT-3摩擦计研究了复合涂层的摩擦学特性。检测复合涂层的力学行为、磨损表面、钢球表面和碎屑尺寸分布，以研究摩擦学机理。结果表明，HBN/EP，与纯 EP 相比，TiO2/EP 和 HBN-TiO2/EP 复合涂层显示出显着的机械性能提升，尤其是在硬度的提高方面。HBN-TiO2/EP 复合涂层的磨损率比纯 EP 降低了 65.8%，表现出突出的摩擦学性能，这归因于 TiO2 的承载能力和自润滑作用对碎屑尺寸的降低。