Research on Forming Process of Micro-nickel Columns Based on Ionic Liquid Jet Localized Electrodeposition
In order to improve the fabricating efficiency and quality of localized electrodeposited 3D metal microstructures,the micro-nickel columns of diameter of 50～100 μm and height of 450～500 μm were fabricated by ionic liquid jet localized electrodeposition.The influence of pulsed current parameters on the depositing rates,morphology and diameter of micro-nickel columns were investigated to evaluate the quality of deposited columns in this paper.The result showed that within the selected parameter range,the diameter and deposition rate of micro-nickel columns increased simultaneously with the increase of interelectrode voltage range.The influence of the duty cycle on the deposition rate was higher than that on the average depositing diameter,and the pulse frequency has no significant variation on the deposition rate.The tip effect on the micro-nickel columns microscopic morphology was observed by the stereo microscope,which indicated there is localization and priority of deposition in common area that the corresponding area to the radius of the anode tip and the range of the ion liquid jet.The micro-nickel column which is more straight and compact with a diameter of 61 μm,can be deposited by controlling the trajectory of anode motion and adopting the optimized parameters including interelectrode voltage of 4.4 V,duty cycle of 50%and pulse frequency of 10 kHz.
ionic liquid jetlocalized electrodepositionmicro-nickel columnforming process
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