飞秒激光诱导Al_2O_3陶瓷表面微纳结构及润湿特性研究

Research on the wetting characteristic and micro-and nanostructures of the Al_2O_3 ceramic surface induced by femtosecond laser

飞秒激光以其极短脉宽和极高的峰值功率几乎可以胜任任何材料的加工.利用飞秒激光微加工平台,通过单点烧蚀和线扫描微加工的方式,在工业级氧化铝陶瓷材料表面诱导出随机分布的纳米结构和条纹结构,条纹结构的周期约为314 nm.文章研究了激光脉冲个数、扫描速度和偏振方向等参数对氧化铝陶瓷表面微纳结构形成的影响.结合激光直写技术,在陶瓷表面诱导出大面积的微纳结构分布,分析了加工前后陶瓷表面润湿特性的变化,实现了陶瓷表面改性.

Femtosecond （fs） laser with extremely short pulse width and high peak power can be competent in ceramic processing. Using single point ablation and line scanning way, the random distribution of nano struc-tures and stripes on the industrial alumina ceramic surface can be induced by fs on the fs laser micro processing platform. The period of the stripes is about 314 nm. The influences of laser pulse number, scanning speed and the polarization direction on the formation of micro/nano structure on the surface of ceramic have been studied. The large area of micro/nano structures on the ceramic surface can be induced by the technology of laser direct writing, and its wetting characteristic is analyzed on the ceramic surface before and after laser processing to real-ize the surface modification.