John Aashish, Saeed Adil, Khan Zulfiqar Ahmad
NanoCorr, Energy & Modelling (NCEM) Research Group, Department of Design & Engineering, Bournemouth University, Talbot Campus, Dorset BH12 5BB, UK.
Materials (Basel). 2023 Mar 9;16(6):2192. doi: 10.3390/ma16062192.
In this study, the viability of duty cycle variation was explored as a potential method to improve the mechanical and surface roughness properties of Ni-AlO nanocoatings through pulse electrodeposition. The areal and surface roughness properties of nanocomposite pulse electrodeposition-coated materials with varying duty cycles from 20% to 100% was studied with the analysis of bearing area curves and power spectral densities. Results demonstrate that with decrease in duty cycle, there was an enhancement in aerial roughness properties from 0.348 to 0.195 µm and surface roughness properties from 0.779 to 0.245 µm. The change in surface roughness was due to grain size variation, resulting from the varying time intervals during pulse coatings. This increase in grain size with the change in duty cycle was confirmed with the scanning electron microscope. In addition, an increase in grain size from 0.32 to 0.92 µm with an increase in duty cycle resulted in a decrease in nanohardness from 4.21 to 3.07 GPa. This work will provide a novel method for obtaining Ni-AlO nanocomposite coatings with improved surface roughness and hardness properties for wider industrial applications.
在本研究中，探索了占空比变化作为一种潜在方法的可行性，通过脉冲电沉积来改善Ni-AlO纳米涂层的机械性能和表面粗糙度特性。通过对承载面积曲线和功率谱密度的分析，研究了占空比从20%到100%变化的纳米复合脉冲电沉积涂层材料的面积粗糙度和表面粗糙度特性。结果表明，随着占空比的降低，面积粗糙度特性从0.348 µm提高到0.195 µm，表面粗糙度特性从0.779 µm提高到0.245 µm。表面粗糙度的变化是由于脉冲涂层过程中不同时间间隔导致的晶粒尺寸变化引起的。通过扫描电子显微镜证实了随着占空比变化晶粒尺寸的增加。此外，随着占空比的增加，晶粒尺寸从0.32 µm增加到0.92 µm，导致纳米硬度从4.21 GPa降低到3.07 GPa。这项工作将为获得具有改善的表面粗糙度和硬度特性的Ni-AlO纳米复合涂层提供一种新方法，以用于更广泛的工业应用。
