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FORMATION OF MICRO-/NANO-SURFACE STRUCTURES ON STAINLESS STEEL BY ULTRAFAST LASERS

机译:超快激光形成不锈钢微/纳米表面结构的形成

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Surface morphology is a critical factor to determine the surface functionality. Ultrafast pulsed laser is a powerful tool to induce multi-scale surface structures on different materials, and thus control their functionalities. This paper presents an experimental study on the micro/nano-scale surface structure formation by femtosecond laser irradiation on stainless steel. The effects of laser fluence, effective pulse number per spot, and repetition rate on the structure morphology and dimension are studied. By controlling the laser parameters, four different types of structures are obtained: (1) laser-induced periodic surface structrues (LIPSS), (2) microgrooves covered by LIPSS, (3) microgrooves/micro-holes covered by LIPSS, and (4) irregular microstructures. The formation dynamics and mechanisms of different structures are investigated.
机译:表面形态是确定表面功能的关键因素。超快脉冲激光器是一种强大的工具,可以在不同材料上引起多尺度表面结构,从而控制其功能。本文介绍了对不锈钢飞秒激光照射的微/纳米尺度表面结构形成的实验研究。研究了激光流量,每点有效脉冲数和重复率对结构形貌和尺寸的影响。通过控制激光参数,获得四种不同类型的结构:(1)激光诱导的周期性表面结构(嘴唇),(2)被嘴唇覆盖的微型侵蚀,(3)嘴唇覆盖的微型孔/微孔(4 )不规则的微观结构。研究了不同结构的形成动态和机制。

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