Abstract
This paper reports enhanced anisotropic wettability using two-level hierarchical micro-structures. First-order micro-channels with superimposed second-order micro-textures were machined on aluminum surfaces using ultrasonic elliptical vibration cutting (EVC). Controllable sinusoidal micro-textures with a wavelength one order of magnitude smaller than the widths of the first-order micro-channels were applied to the surface. Anisotropic wettability was evaluated by water contact angle measurements in two orthogonal directions. The results have shown that the generated hierarchical micro-structures have nearly doubled the anisotropic contact angle in comparison to one-level structures. A relationship between anisotropic wetting characteristics and process parameters is also presented.
Original language | English (US) |
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Pages (from-to) | 553-556 |
Number of pages | 4 |
Journal | CIRP Annals - Manufacturing Technology |
Volume | 63 |
Issue number | 1 |
DOIs | |
State | Published - 2014 |
Keywords
- Anisotropic wetting
- Micro machining
- Surface modification
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering