研究目的
Investigating the effect of changing the surface roughness and the laser focus distance on the appearance of Aluminum using a picosecond laser.
研究成果
The study concludes that factors such as the spacing between LIPSSs, the surface microstructure, the size of cavities, shape, spatial periodicity, and smoothness of microstructure are responsible for the differences in the samples' appearances. The dark colors are associated with samples having smoother surfaces before treatment, while brighter colors are seen in samples with rougher surfaces.
研究不足
The study is limited to Aluminum samples and does not explore the effects on other materials. The range of laser focus distances and surface roughness levels tested may not cover all possible variations.
1：Experimental Design and Method Selection:
The study used a picosecond laser to treat Aluminum samples, varying the laser focus distance and the samples' surface roughness.
2：Sample Selection and Data Sources:
Aluminum samples (
3：998% Al) with 1mm thickness were used. List of Experimental Equipment and Materials:
A picosecond laser (HE 1060-series), focusing lens, and a stage for sample movement were used.
4：Experimental Procedures and Operational Workflow:
Samples were treated with the laser at different focal distances and surface roughness levels, then characterized using SEM and surface roughness measurements.
5：Data Analysis Methods:
SEM images and FFT analysis were used to identify characteristic surface textures and structures.
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