SiC_p/Al复合材料纳秒脉冲光纤激光刻蚀

Nanosecond Pulsed Fiber Laser Ablation of SiC_p/Al Composite Materials

研究了在高压辅助气体作用下运用纳秒脉冲激光刻蚀SiC陶瓷颗粒增强Al基复合材料的可行性。结果表明,刻蚀深度随激光能量的增加而增大。由于刻蚀过程中发生了复杂的冶金反应,在刻蚀表面很难观察到独立的SiC颗粒。重凝层内Al、Si、C、O元素空间分布相对均匀,其厚度和表面粗糙度随激光能量的增加而增加,并呈饱和趋势。高压同轴气体的机械作用是材料蚀除的主要机制。

The possibility of using nanosecond pulsed laser ablation of aluminium matrix composite reinforced with SiC ceramic particles under the assistance of high pressure gas is investigated. The results indicate that the ablation depth increases with the increase of pulse energy. It is very difficult to find the isolate SiC particle on the ablated surface due to the occurrence of complicated metallurgical reaction during the ablation process. The Al, Si, C, and O elements within the re-solidified layers have a relatively uniform distribution, and the thickness and surface roughness of the re-solidified layers increase with the increase of pulse energy, which presents a tendency of saturation. The mechanical action of high pressure co-axial gas is the key mechanism of material removal.