Influence of laser parameters on processing microgrooves of 2.5-dimensional C/SiC composites via nanosecond laser

In order to investigate the removal mechanism of C/SiC composites processed by nanosecond laser, and to obtain a groove width and depth with better consistency, in this study, a nanosecond laser was used to ablate 2.5-dimensional C/SiC composites to explore the influence of laser processing parameters and fibre arrangement on the ablation morphology. The experimental results were analysed based on the finite element simulation. The results showed that the amount of material removed and ablation morphology varied considerably between the start and end of the grooves, and the edge effect was pronounced. In addition, the morphology of the ablated groove was affected by the fibre arrangement direction. The temperature field of the C/SiC composite during laser processing was simulated using finite element software. The simulation results intuitively showed that there was a temperature difference between the start and end of the ablation. Further, the temperature field distribution varied by position. Finally, the ablation removal mechanism for the nanosecond laser processing of 2.5-dimensional C/SiC composites was explored by experimental and temperature field simulation results, and laser scanning parameters were optimized to obtain the groove width and depth with better consistency.