The temperature profile in the molten layer of a semi-infinite target induced by irradiation using a pulsed laser

Pulsed Laser Heating and Melting

“…Other models attempt to improve on the simplifying assumption by incorporating, for example, a temperature dependent absorption coefficient as well as the temporal variation of the pulse energy (Abd El-Ghany, 2001;El-Nicklawy et al, 2000) . These are some of the simplest models; 1-D heat flow after a single pulse incident on a homogeneous solid target with surface absorption.…”

On the evaporation of a semi-infinite target induced by a pulsed laser

“…To be able to treat the problem, the pulse duration was subdivided into three parts: the first part is responsible for the heating process up to the time of reaching the front surface of the target, the melting temperature [16]. The second part deals with the time responsible for the melting process up to the time at which the surface of the molten layer reaches the evaporation temperature [21]. The third part is responsible for the evaporation process.…”

“…The temperature distributions within the target at the time of initiating the melting process as well as the temperature distributions within the liquid part and the still solid part of the target at the time of initiating the evaporation process which are required in the Laplace transform are obtained from [20] and [21], respectively. The result of this technique leads when applied on Eqs.…”

“…El-Nicklawy et al [20] have studied the problem of melting a semi-infinite target irradiated with a pulsed laser assuming the temperature distribution in the molten layer to be constant and equal to the melting temperature (T m ). Abd El-Ghany [21] has studied the same problem considering a temperature profile in the molten layer. Abd El-Ghany [22] has also studied the problem of melting a thin-film coated on a substrate induced by irradiation with a pulsed laser considering a spatial temperature distribution within the molten layer.…”