فهرست نشریات علمی دسترسی آزاد ایران

Titanium (Ti) has poor tribological and mechanical properties such as low hardness and wear resistance. In this study, we considerably improve Ti’s hardness by laser ablation method. Ambient air, N 2 gas chamber and N 2 /liquid water environments were separately selected as irradiation environments and their effect was comparatively studied on Ti treatment surfaces. The fabrication of titanium nitride (TiN) structure was successfully confirmed by XRD analysis in N 2 gas and N 2 /liquid water as irradiation media. Accordingly, there was good adhesion between TiN structure and Ti’s surface. Vickers hardness test indicated the laser treatment and TiN structure significantly improved Ti’s hardness. The formed TiN structure in N 2 /liquid water environment had the highest hardness value of 530Hv comparing to hardness of ablated Ti in N 2 gas (370Hv) and air (340Hv). The escalation of Ti hardness and generation of TiN structure with lasertreatment in N 2 /liquid water environment is a favorable aspect of this method.