高速微钻削构建孔阵列疏水表面
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摘要
利用高速精密微铣削机床在铝合金表面加工微孔阵列结构,研究了直径为200μm的微钻头钻削铝合金时,钻削参数对孔的加工质量的影响,并对优化参数加工后铝合金表面的微观结构和疏水性能进行了观测。结果表明:在高速精密微钻削过程中,进给量对孔的加工质量存在一定的影响,当主轴转速为30000r/min,进给量为0.001mm/r时,孔的表面质量最好。在本征接触角约为50°的光滑铝合金表面上加工微米级孔阵列结构可有效提高材料表面的疏水性能,接触角大小随孔间距增大而减小,随孔深度增加有所提升,未经化学修饰表面接触角最高达到113°,实现了基于高速精密微钻削技术在金属材料表面上构建微观结构阵列,使材料表面润湿性由亲水向疏水的转变。
High speed precision micro-milling machine was used to fabricate micro-hole array structure on the surface of aluminum alloy,the influence of drilling parameters on the machining quality was studied when drilling the aluminum alloy surface by using micro-diameter drill with a diameter of 200μm,and then the microstructure which was processed by using optimal parameters and the hydrophobic properties of aluminum alloy surface were observed. The result show that in the process of high speed precision micro-drilling,the feed have a certain effect on the micro-hole machining quality. When the spindle speed was 30000 r/min and the load was 0.001 mm/r,the best processing quality was obtained. The hydrophobic properties of material surface can be effectively improved by the micro-hole array structure which was processed on the smooth aluminum alloy surface when the intrinsic contact Angle was about 50°. The contact angle was decreased with increasing hole pitch and increased with increasing of hole depth. And the contact angle can reach to 113° without the chemical modification,the microstructure array was constructed on the surface of metal materials based on high speed precision micro-drilling technique,and the surface wettability of the material was transformed by hydrophilic to hydrophobic.
High speed precision micro-milling machine was used to fabricate micro-hole array structure on the surface of aluminum alloy,the influence of drilling parameters on the machining quality was studied when drilling the aluminum alloy surface by using micro-diameter drill with a diameter of 200μm,and then the microstructure which was processed by using optimal parameters and the hydrophobic properties of aluminum alloy surface were observed. The result show that in the process of high speed precision micro-drilling,the feed have a certain effect on the micro-hole machining quality. When the spindle speed was 30000 r/min and the load was 0.001 mm/r,the best processing quality was obtained. The hydrophobic properties of material surface can be effectively improved by the micro-hole array structure which was processed on the smooth aluminum alloy surface when the intrinsic contact Angle was about 50°. The contact angle was decreased with increasing hole pitch and increased with increasing of hole depth. And the contact angle can reach to 113° without the chemical modification,the microstructure array was constructed on the surface of metal materials based on high speed precision micro-drilling technique,and the surface wettability of the material was transformed by hydrophilic to hydrophobic.
引文
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[2]Yin YS,Liu T,Chen SG,et al.Structure stability and corrosion inhibition of super-hydrophobic film on aluminum in sea water[J].Applied Surface Science,2009,255(05):2978-2984.
[3]Thieme M,Frenzel R,Schmidt S,et al.Generation of Ultrahydrophobic Properties of Aluminum-A first Step to Self-cleaning Transparently Coated Metal Surfaces.Adv Eng Mater.2001,3(09):691-695.
[4]弯艳玲,张学蕊,张留新,等.高速微铣削构建疏水性铝合金表面[J].中国表面工程,2013,26(05):37-42.
[5]Li W,Amirfazli A.Microtextured superhydrophobic surfaces:A thermodynamic analysis[J].Advances in Colloid and Interface Science,2007,132(02):51-68.
[6]Salvadori MC,Cattani M,Oliveira MRS,et al.Design and fabrication of microcavity-array superhydrophobic surfaces[J].Journal of Applied Physics,2010,108(02):988.
[7]Salvadori MC,Cattani M,Oliveira MRS,et al.Design and fabrication of superhydrophobic surfaces formed of microcavities[J].Applied Physics Letters,2010,96(07):074101-1-074101-3.