AP01018 Effects of Laser Energy on Characteristics of Plasma Produced by Laser Ablation of Ni-Ti Targets

Abstract

This work shows aims to study the effect of plasma characteristics induced by a pulsed laser from a nickel-titanium (Ni-Ti) target at varying laser energy with the composition phase, structural, and surface morphology of the ablated nanoparticles. The increasing intensity of Ti II lines at higher energies, while absent of nickel, indicates differences between the excitation capabilities of the two metals. The electron temperature increases with the pulse energy, affecting the crystallinity and phase composition of the prepared nanoparticles. The plasma density increased with the laser energy due to the rise in the ionisation process. The XRD analysis of Ni/Ti NPs demonstrates that increasing laser energy leads to an increase in the Ni phase, enhanced crystallinity, and reduced strain in the nanoparticles. The FE-SEM images confirm the variation in morphology with increasing laser energy, enhancing the particles' uniformity. The 900 mJ laser energy ablation is more suitable for applications requiring high density such as in biomedical implants.