Vaporization effect studying on high-power nanosecond pulsed laser deposition

The vaporization effect generated by high-power nanosecond pulsed laser ablation was studied in detail based on the heat flux equation which accounting for the energy loss of vaporization. The vaporization velocity and temperature evolvement with different laser fluence, and the effect of vaporization on ablation depth during and after the laser irradiation were emphatically analyzed. The results show that the vaporization strongly affects the surface temperature and whole ablation depth in the pulsed laser ablation. Under the same experimental conditions, the numerical results calculated with our modified ablation depth calculation formula are more in agreement with the experimental datum. (c) 2005 Elsevier B.V. All rights reserved.