Abstract

In this study, microstructure and corrosion property of CoCrMo coatings reinforced with different content of multi-walled carbon nanotubes (MWCNTs) nanoparticles fabricated by laser cladding (LC) on titanium alloy (TC4) substrates are investigated. Microhardness, metallographic, X-ray diffraction (XRD), and the electrochemical analysis are carried out to clarify the role of CNTs on the improvement of corrosion resistance. The results indicate that the addition of CNTs can significantly refine the structure of the CoCrMo alloy coating. Besides, the hardness of CoCrMo coating reinforced with 1.5 percentage of CNTs is about 9.8 times of the non-addition one. Additionally, CNTs have a positive influence on the corrosion performance of the CoCrMo coating in acid simulation saliva environment, which may be mainly attributed to the superior property of CNTs themselves and the formation of carbide and martensite hard phases in the cladding layers.

中文翻译：

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碳纳米管对激光熔覆生物医学CoCrMo涂层微观结构和腐蚀行为的影响

摘要

在这项研究中，研究了在钛合金（TC4）基底上通过激光熔覆（LC）制备的不同含量的多壁碳纳米管（MWCNTs）纳米颗粒增强的CoCrMo涂层的组织和腐蚀性能。进行了显微硬度，金相，X射线衍射（XRD）和电化学分析，以阐明CNT在改善耐蚀性方面的作用。结果表明，CNT的添加可以显着改善CoCrMo合金涂层的结构。此外，用1.5％的CNT增强的CoCrMo涂层的硬度约为非添加剂的9.8倍。此外，CNT在酸性模拟唾液环境中对CoCrMo涂层的腐蚀性能有积极影响，