Texturing of metallic surfaces for superhydrophobicity by water jet guided laser micro-machining

2020 ◽  
Vol 500 ◽  
pp. 144286 ◽  
Author(s):  
Yi Shi ◽  
Zilin Jiang ◽  
Jian Cao ◽  
Kornel F. Ehmann
Keyword(s):  
Water Jet ◽  
Micro Machining ◽  
Metallic Surfaces ◽  
Laser Micro Machining

Generation of Surfaces with Isotropic and Anisotropic Wetting Properties by Curved Water Jet Guided Laser Micro-Machining

2020 ◽  
Author(s):  
Yi Shi ◽  
Jian Cao ◽  
Kornel Ehmann
Keyword(s):  
Water Jet ◽  
Nanosecond Laser ◽  
Micro Machining ◽  
Metallic Surfaces ◽  
Wetting Properties ◽  
Laser Micro Machining ◽  
Jet Trajectory ◽  
Wide Range ◽  
Secondary Motion ◽  
Motion Speed

Abstract This experimental work utilizes a newly developed method, curved water jet guided laser micro-machining, to generate micro features on metallic surfaces. During the process, material is removed by a high-power nanosecond laser beam which is transmitted through a high-pressure micro water jet via total internal reflection. To achieve intricate texturing patterns, a secondary motion component is superimposed on the XY motion of the workpiece provided by the motion stage. The secondary motion is generated by deflecting the water jet trajectory by a controllable dielectrophoretic force. The induced secondary motion of the water jet cuts the processing time to one half when generating texture patterns for isotropic wetting as compared to processes with only XY motion. The ability to alter the water jet's trajectory by tens of microns at high frequencies, which is beyond the capability of conventional CNC machines, allows a wide range of different micro patterns to be generated, profoundly increasing the flexibility and efficiency of the process as compared to conventional approaches. As a demonstration, surface textures for isotropic and anisotropic behaviors are generated on stainless steel surfaces. The influence of feature spacing, motion speed (frequency) and texturing patterns on surface wettability are studied.

Generation of Surfaces With Isotropic and Anisotropic Wetting Properties by Curved Water Jet Guided Laser Micro-Machining

2020 ◽  
Author(s):  
Yi Shi ◽  
Jian Cao ◽  
Kornel F. Ehmann
Keyword(s):  
Water Jet ◽  
Nanosecond Laser ◽  
Micro Machining ◽  
Metallic Surfaces ◽  
Wetting Properties ◽  
Laser Micro Machining ◽  
Jet Trajectory ◽  
Wide Range ◽  
Secondary Motion ◽  
Motion Speed

Abstract This experimental work utilizes a newly developed method, curved water jet guided laser micro-machining, to generate micro features on metallic surfaces. During the process, material is removed by a high-power nanosecond laser beam which is transmitted through a high-pressure micro water jet via total internal reflection. To achieve intricate texturing patterns, a secondary motion component is superimposed on the XY motion of the workpiece provided by the motion stage. The secondary motion is generated by deflecting the water jet trajectory by a controllable dielectrophoretic force. The induced secondary motion of the water jet cuts the processing time to one half when generating texture patterns for isotropic wetting as compared to processes with only XY motion. The ability to alter the water jet’s trajectory by tens of microns at high frequencies, which is beyond the capability of conventional CNC machines, allows a wide range of different micro patterns to be generated, profoundly increasing the flexibility and efficiency of the process as compared to conventional approaches. As a demonstration, surface textures for isotropic and anisotropic behaviors are generated on stainless steel surfaces. The influence of feature spacing, motion speed (frequency) and texturing patterns on surface wettability are studied.

Laser micro machining of 3C–SiC single crystals

2006 ◽  
Vol 83 (4-9) ◽  
pp. 1400-1402 ◽  
Author(s):  
Sandra Zoppel ◽  
Maria Farsari ◽  
Robert Merz ◽  
Johann Zehetner ◽  
Günther Stangl ◽  
...  
Keyword(s):  
Single Crystals ◽  
Micro Machining ◽  
Laser Micro Machining

Demonstration of an Edge-lit Light-guide Plate Using Laser Micro-machining Technique

2015 ◽  
Vol 44 (11) ◽  
pp. 1122002
Author(s):  
陈恩果 CHEN En-guo ◽  
黄炳乐 HUANG Bing-le ◽  
徐胜 XU Sheng ◽  
郭太良 GUO Tai-liang
Keyword(s):  
Light Guide ◽  
Micro Machining ◽  
Laser Micro Machining ◽  
Light Guide Plate ◽  
Guide Plate

Substrateless Terahertz Band-Pass Filters Fabricated by Femtosecond Laser Micro-Machining

2018 ◽  
Vol 55 (2) ◽  
pp. 021415
Author(s):  
高炳攀 Gao Bingpan ◽  
林炎章 Lin Yanzhang ◽  
陈盈 Chen Ying ◽  
陈燕青 Chen Yanqing ◽  
王向峰 Wang Xiangfeng
Keyword(s):  
Femtosecond Laser ◽  
Micro Machining ◽  
Terahertz Band ◽  
Laser Micro Machining ◽  
Band Pass
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