摘要
As a new research area, laser surface wettability modification brings new applications for both laser and materials for industry. The picoseconds （10 ps） pulse laser surface micro-processing over alumina covered aluminium is researched. In the experiment, lO-ps laser pulse is employed and the energy threshold for different laser wavelength and repetition rate is measured. At the repetition rate of 5 kHz, the energy thresholds are： 1064 nm： 4.0 μJ/pulse, 532 nm： 2.8 μJ/pulse, and 355 nm： 4.2 #J/pulse. Picoseconds pulse laser is demonstrated feasible in surface scanning at industrial level.
As a new research area, laser surface wettability modification brings new applications for both laser and materials for industry. The picoseconds （10 ps） pulse laser surface micro-processing over alumina covered aluminium is researched. In the experiment, lO-ps laser pulse is employed and the energy threshold for different laser wavelength and repetition rate is measured. At the repetition rate of 5 kHz, the energy thresholds are： 1064 nm： 4.0 μJ/pulse, 532 nm： 2.8 μJ/pulse, and 355 nm： 4.2 #J/pulse. Picoseconds pulse laser is demonstrated feasible in surface scanning at industrial level.
