Theoretical study of the Heterogeneous Films Modified by the Laser Radiation

A model for melting of a nanoporous material by means of nanosecond laser pulses was developed. In present model the pore size is small in comparison with film thickness and when film temperature reaches the melting temperature there is an instantaneous collapse of pores under the influence of surface tension forces. In numerical solution the temperature dependence of thermophysical quantities of a material and material porosity were taken into account. The melting penetration depth was determined with due regard for the material porosity.