电火花线切割制备超疏水铜表面的正交试验

采用电火花线切割技术在铜表面构筑了复合粗糙结构,经自组装技术处理后得到了超疏水铜表面,通过正交试验方法对电火花线切割机床的脉冲宽度、脉冲间隔和峰值电流(功率管个数)参数进行了优化,并讨论了电火花线切割机床放电参数对表面润湿性能的影响。结果表明,电火花线切割机床在铜表面构筑出陨石坑-突起复合粗糙结构。不同的电火花线切割加工参数产生不同尺度的微观结构,并影响铜表面的疏水性。当脉冲宽度为32μs,脉冲间隔为128μs,功率管为2个时,制得的铜表面静态接触角最高,为156.42°,滚动角为3°,为超疏水铜表面工业化生产提供了理论支撑。

Experimental Study of Super-hydrophobic Brass Surface Obtained by WEDM

Wire cut electrical discharge machining (WEDM) was used to fabricate a composite rough structure on cop-per substrate. To achieve super-hydrophobic copper surface, self-assembly technique was used to modify the resulting copper surface. Several major parameters of the wire electrical discharge machining processing, such as pulse width, pulse gap (pulse interval) and number of power tube, were optimized by use of orthogonal optimization method. And the effect of wire electrical discharge machining processing parameters on the wettability of copper surface was dis-cussed. Results showed that the bump-scales composite structures were formed on the copper surface by WEDM. The wettability of copper surface was decided by the scale of microstructures,which varied with the change of the process-ing parameters of WEDM. When the pulse width was 32μs,pulse interval was 128μs,the number of power tube was 2,static contact angle of copper surface got the highest value,156.42°,and the sliding angle was 3°. This paper pro-vided the theoretical support for industrialized fabrications of super-hydrophobic brass surface.