This paper presents wear and corrosion resistance analysis of carbon nanotubes coated with Ti-6Al-4V alloy processed by electro-discharge treatment. The reported work is carried out using Taguchi’s L18 orthogonal array to design the experimental matrix by varying five input process parameters i.e., dielectric medium (plain dielectric, multi-walled carbon nanotubes (MWCNTs) mixed dielectric), current (1–4 A), pulse-on-time (30–60 µs), pulse-off-time (60–120 µs), and voltage (30–50 V). The output responses are assessed in terms of microhardness and surface roughness of the treated specimen. X-ray diffraction (XRD) spectra of the coated sample reveal the formation of intermetallic compounds, oxides, and carbides, whereas surface morphology is observed using scanning electron microscopy (SEM) analysis. For the purpose of the in-vitro wear behavior of treated samples, the surface with superior microhardness values in plain dielectric and MWCNTs mixed dielectric is compared using a pin-on-disc type wear test. Furthermore, electrochemical corrosion test is also conducted to portray the dominance of treated substrate of Ti-6Al-4V alloy for biomedical applications. It is concluded that the wear-resistant and the corrosion protection efficiency of the MWCNTs treated substrate enhanced to 95%, and 96.63%, respectively.

中文翻译：

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利用碳纳米管混合放电工艺增强 Ti6Al4V 合金的耐腐蚀性和耐磨性。

本文对电火花处理后涂覆Ti-6Al-4V合金的碳纳米管进行了耐磨性和耐腐蚀性能分析。所报告的工作是使用田口的 L18 正交阵列通过改变五个输入工艺参数来设计实验矩阵，即电介质（普通电介质、多壁碳纳米管 (MWCNT) 混合电介质）、电流 (1–4 A)、脉冲开启时间 (30–60 µs)、脉冲关闭时间 (60–120 µs) 和电压 (30–50 V)。输出响应根据已处理样品的显微硬度和表面粗糙度进行评估。涂层样品的 X 射线衍射 (XRD) 光谱揭示了金属间化合物、氧化物和碳化物的形成，而表面形态则通过扫描电子显微镜 (SEM) 分析进行观察。为了研究处理过的样品的体外磨损行为，使用钉盘式磨损测试对普通电介质和多壁碳纳米管混合电介质中具有优异显微硬度值的表面进行了比较。此外，还进行了电化学腐蚀测试，以展示经过处理的 Ti-6Al-4V 合金基材在生物医学应用中的优势。结果表明，经过MWCNTs处理的基材的耐磨性和防腐效率分别提高到95%和96.63%。