Nanoscale evaluation of surface roughness of metal films prepared by laser ablation

LaAlO 3 thin films have been deposited on (100) LaAlO 3 substrates by pulsed laser ablation. The deposited films showed the (h00) preferential orientations. Surface profiles indicated that the surface roughness of the films decreased with the increase of the oxygen partial pressure. High quality superconducting YBa 2 Cu 3 O 7 thin films have been successfully deposited by laser ablation on the (100) LaAlO 3 substrates with the LaAlO 3 layers.

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Underwater Laser Turning of Commercially-Pure Titanium

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.861.23 ◽

2020 ◽

Vol 861 ◽

pp. 23-27

Author(s):

Wisan Charee ◽

Viboon Tangwarodomnukun

Keyword(s):

Surface Roughness ◽

Laser Ablation ◽

Laser Power ◽

Pure Titanium ◽

Ambient Air ◽

Machining Process ◽

Commercially Pure Titanium ◽

Turning Process ◽

Commercially Pure ◽

Underwater Laser

Underwater laser machining process is a material removal technique that can minimize thermal damage and offer a higher machining rate than the laser ablation in ambient air. This study applied the underwater method associated with a nanosecond pulse laser for turning a commercially pure titanium rod. The effects of laser power, surface speed and number of laser passes on machined depth and surface roughness were investigated in this work. The results revealed that a deeper cut depth and smoother machined surface than those obtained from the laser ablation in ambient air were achievable when the underwater laser turning process was applied. The machined depth and surface roughness were found to significantly increase with the laser power and number of laser passes. The findings of this study can disclose the insight as well as potential of the underwater laser turning process for titanium and other similar metals.

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Spatial Chemical Analysis of Electrodeposited Metal Films By Femtosecond Laser Ablation Ionization Mass Spectrometry

ECS Meeting Abstracts ◽

10.1149/ma2018-01/19/1259 ◽

2018 ◽

Keyword(s):

Mass Spectrometry ◽

Laser Ablation ◽

Chemical Analysis ◽

Femtosecond Laser ◽

Femtosecond Laser Ablation ◽

Metal Films ◽

Ionization Mass Spectrometry ◽

Ionization Mass ◽

Electrodeposited Metal

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SURFACE ROUGHNESS STUDY ON MICROCHANNELS OF CO2 LASER FABRICATING PMMA-BASED MICROFLUIDIC CHIP

Surface Review and Letters ◽

10.1142/s0218625x17500172 ◽

2017 ◽

Vol 24 (02) ◽

pp. 1750017 ◽

Cited By ~ 9

Author(s):

XUEYE CHEN ◽

TIECHUAN LI ◽

BAODING FU

Keyword(s):

Surface Roughness ◽

Laser Ablation ◽

Laser Power ◽

Sacrificial Layer ◽

Ultrasonic Method ◽

Solution Concentration ◽

Microfluidic Chips ◽

Power Laser ◽

Best Value ◽

Novel Method

A novel method named soak sacrificial layer ultrasonic method (SSLUM) has been presented for optimizing the surface roughness of the microchannels of polymethyl methacrylate (PMMA)-based microfluidic chips. CO2 laser was used for ablative microchannels on the PMMA sheet, and the effects of key parameters including laser power, laser ablation speed and solution concentration on the surface roughness of microchannels were estimated and optimized by SSLUM. The experimental observation demonstrates that the surface roughness results mainly from the residues on the channel wall, which are produced by the bubbles movement and bursting. The research results show that the surface roughness can be improved effectively by using SSLUM. In our experiment, the best value was Ra [Formula: see text] 110[Formula: see text]nm with laser power 12[Formula: see text]W, laser ablation speed 10[Formula: see text]mm/s, the solution concentration 75%, and the time of ultrasonic vibration 25[Formula: see text]min. SSLUM is proven to be an effective, simple and rapid method for optimizing the surface roughness of microchannels of microfluidic chips.

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