Laser ablation behavior and mechanisms of 3D carbon fiber reinforced ZrB2-SiC composite

The high-performance 3D C f-PyC /ZrB 2 -SiC composite was fabricated by vibration-assisted slurry impregnation and low-temperature hot pressing. The composite exhibited superior laser ablation resistance, leading to a low linear loss rate of 1.56×10 −2 mm/s at laser power density of 4878 W/cm 2 (Power 300 W, Laser beam diameter 2.8 mm) for 90 s. The coupling effect of a dense SiO 2 layer in fringe region followed by dense ZrO 2 layer in transitional region and next porous ZrO 2 layer in center region achieved superior laser ablation resistance.