Yunsong Lian

Femtosecond pulsed laser nanotexturing of Al2O3/TiC ceramic

Laser-induced periodic nanotextures (ripples) on Al2O3/TiC ceramic formed by femtosecond laser pulses were investigated. Pulse energy, scanning speed and the number of overscans were studied for the formation of ripples. The evolution of surface morphology, surface roughness and ablation depth with different parameters was measured by scanning electron microscopy, white lighting interferometer and atomic force microscopy. The experimental results indicate that the nanotextures are dependent on the pulse energy and scanning speed, and the optimum parameter for the formation of continuous and clear ripples is 1.75 μJ with 500 μm s−1 or 2 μJ with 500 μm s−1. Finally, the mechanism of the formation of laser-induced periodic surface nanotextures on Al2O3/TiC ceramic surface was discussed.