scholarly journals Optimization of Selective Laser Etching (SLE) for Glass Micromechanical Structure Fabrication

2021 ◽  
Author(s):  
Agne Butkute ◽  
Tomas Baravykas ◽  
Jokubas Stancikas ◽  
Titas Tickunas ◽  
Rokas Vargalis ◽  
...  
Keyword(s):  
Laser Etching

scholarly journals Study on the Influence of Surface Temperature Field of Aluminum Alloy Etched by Laser Water Jet Composite Machining

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3206
Author(s):  
Xuehui Chen ◽  
Xin Xu ◽  
Wei Liu ◽  
Lei Huang ◽  
Hao Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Surface Temperature ◽  
Process Parameters ◽  
Water Jet ◽  
Laser Machining ◽  
Material Surface ◽  
Laser Etching ◽  
Surface Temperature Field

This paper studies the compound effect of liquid medium and laser on the workpiece and analyses the law of material surface temperature change during the processing. Taking 7075-T6 aluminum alloy as the research object, the surface temperature field of aluminum alloy processed using water-jet-assisted laser machining under different process parameters was simulated using finite element software. In addition, the temperature field of the material surface was detected in real-time using the self-built water-jet-assisted laser machining temperature field detection system, and the processing results were observed and verified using an optical microscope, scanning electron microscope, and energy spectrum analyzer. The results show that when the water jet inflow angle is 45°, the heat-affected area of the material surface is the smallest, and the cooling effect of the temperature field of the material surface is better. Considering the liquidus melting point of 7075 aluminum alloys, it is concluded that the processing effect is better when the water jet velocity is 14 m·s−1, the laser power is 100 W, and the laser scanning speed is 1.2 mm·s−1. At this time, the quality of the tank is relatively good, there are no cracks in the bottom of the tank, and there is less slag accumulation. Compared with anhydrous laser etching, water-jet-assisted laser etching can reduce the problems of micro-cracks, molten slag, and the formation of a recast layer in laser etching and improve the quality of the workpiece, and the composition of the bottom slag does not change. This study provides theoretical guidance and application support for the selection and optimization of process parameters for water-jet-assisted laser etching of aluminum alloy and further enriches the heat transfer mechanism of multi-field coupling in the process of water-jet-assisted laser machining.

Femtosecond Multistep Laser Etching of Transparent Amorphous Organic Film

2001 ◽  
Vol 40 (Part 2, No. 10B) ◽  
pp. L1116-L1118 ◽  
Author(s):  
Yoichiroh Hosokawa ◽  
Masaki Yashiro ◽  
Tsuyoshi Asahi ◽  
Hiroshi Masuhara ◽  
Toshiaki Kadota ◽  
...  
Keyword(s):  
Organic Film ◽  
Laser Etching

KrF excimer laser etching of diamondlike carbon films

1992 ◽  
Author(s):  
Taras V. Kononenko ◽  
Vitali I. Konov ◽  
Victor G. Ralchenko ◽  
V. E. Strelnitsky
Keyword(s):  
Excimer Laser ◽  
Carbon Films ◽  
Laser Etching ◽  
Diamondlike Carbon ◽  
Krf Excimer Laser

F2 laser etching of GaN

2000 ◽  
Vol 168 (1-4) ◽  
pp. 335-339 ◽  
Author(s):  
T. Akane ◽  
K. Sugioka ◽  
S. Nomura ◽  
K. Hammura ◽  
N. Aoki ◽  
...  
Keyword(s):  
Laser Etching

Modeling of pulsed laser etching of high‐Tcsuperconductors

1990 ◽  
Vol 68 (10) ◽  
pp. 5273-5277 ◽  
Author(s):  
A. N. Jette ◽  
W. J. Green
Keyword(s):  
Pulsed Laser ◽  
Laser Etching

scholarly journals Preparation of anticoagulant PyC biomaterials with super-hydrophobic surface

2018 ◽  
Vol 16 (1_suppl) ◽  
pp. 125-131
Author(s):  
Wang Ze ◽  
Tan Wen-sheng ◽  
Ye-Xia ◽  
Zhang Ming ◽  
Li Xiao-ping ◽  
...  
Keyword(s):  
Contact Angle ◽  
Flow Resistance ◽  
Hydrophobic Surface ◽  
Pyrolytic Carbon ◽  
Zno Film ◽  
Laser Etching ◽  
Electrospinning Method ◽  
Microhole Array ◽  
Nanofiber Film ◽  
Infiltration Experiment

Introduction: Pyrolytic carbon (PyC) is a kind of biomaterial which is chemically inert and has excellent biocompatibility. In order to obtain a super-hydrophobic PyC surface to improve anticoagulation and inhibit thrombus, this study prepares grating pair structure, microhole array structure, helix structure on PyC surface by nanoseconds laser etching. Methods: Rod-like ZnO film and ball-like ZnO film are prepared on the PyC surface by the hydrothermal method; polyvinyl pyrrolidone (PVP) nanofiber film and PVP/TiO2 complex nanofiber film are prepared on the PyC surface by the electrospinning method; the PyC surface is silanized. Finally, surface microstructure and surface energy are characterized by scanning electron microscopy and contact angle meter (OCA20, German DataPhysics Co.). Results: The periodical microstructures are formed respectively by nanoseconds laser etching. The surface roughness is increased by the hydrothermal and electrospinning method. Conclusions: Through infiltration experiment on rough and smooth PyC surfaces, rough PyC surface with microstructure is super-hydrophobic and has greater than 150° contact angle, which decreases blood flow resistance and inhibits thrombus.

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