Graphite was irradiated by CO2 laser of energy 10 J and pulse width 4
mu s. SEM and XRD examinations were carried out before and after laser
irradiation. It was observed that XRD pattern changed after irradiati
on and new entities were seen on surface. Amorphous graphite was also
irradiated and it was found that it became partly crystalline. The cha
nges were explained on the basis of phase changes induced by high pres
sures and temperatures during laser irradiation.