A novel tungsten carbide (WC)- and ceria (CeO₂)-reinforced cobalt (Co) matrix composite coating was synthesized through a one-step co-electrodeposition method. The growth mechanism of the coating and the formation mechanism of the protrusion and gully structure on the coating surface were explored. Furthermore, the mechanism of the influence of ceria concentration on the deposition rate and content of tungsten carbide is discussed. The results revealed that the coating fabricated at 6 g/l ceria achieved a dense structure, a fine grain size, a high content of tungsten carbide (19.9 wt.%) and a high deposition rate (78.2 μm/h). The average thickness of the coating was 118.48 μm, and the composite coating had a preferred orientation of cobalt (101) texture. In addition, the maximum microindentation hardness of the coating deposited at 6 g/l ceria was obtained as 627 HV. The electrodeposits possessed a superior anti-wear behavior, which was mainly ascribed to the synergistic effect of tungsten carbide and ceria in improving the mechanical properties of the cobalt matrix composite coating.

中文翻译：

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CeO2浓度对Co-WC复合材料微观结构和磨损行为的影响

一种新型碳化钨 (WC)- 和氧化铈 (CeO ₂)-增强的钴(Co)基复合涂层是通过一步共电沉积的方法合成的。探讨了涂层的生长机理以及涂层表面突起和沟壑结构的形成机理。此外，讨论了氧化铈浓度对碳化钨沉积速率和含量的影响机制。结果表明，以 6 g/l 氧化铈制造的涂层实现了致密的结构、精细的晶粒尺寸、高碳化钨含量 (19.9 wt.%) 和高沉积速率 (78.2 μm/h)。涂层的平均厚度为118.48 μm，复合涂层具有钴(101)织构的择优取向。此外，以 6 g/l 氧化铈沉积的涂层的最大显微压痕硬度为 627 HV。