Optimization of laser-induced periodic surface structures formation on zirconia ceramic by ultrashort pulsed laser

2021 ◽  
Author(s):  
Hideyuki Takada ◽  
Aiko Narazaki ◽  
Dai Yoshitomi ◽  
Kenji Torizuka ◽  
Yohei Kobayashi
Keyword(s):  
Pulsed Laser ◽  
Surface Structures ◽  
Zirconia Ceramic ◽  
Periodic Surface ◽  
Ultrashort Pulsed Laser

scholarly journals Effects of Pulse Duration and Heat on Laser-Induced Periodic Surface Structures

2020 ◽  
Vol 14 (4) ◽  
pp. 552-559
Author(s):  
Shuhei Kodama ◽  
Keita Shimada ◽  
Masayoshi Mizutani ◽  
Tsunemoto Kuriyagawa ◽  
◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Pulse Duration ◽  
Pulse Laser ◽  
Pulsed Laser ◽  
Laser Wavelength ◽  
Surface Structures ◽  
Pulsed Lasers ◽  
Efficient Technology ◽  
Periodic Surface ◽  
Ultrashort Pulsed Lasers

Compared with traditional nanotexturing methods, an ultrashort-pulsed laser is an efficient technology of fabricating nanostructures called laser-induced periodic surface structures (LIPSS) on material surfaces. LIPSS are easily fabricated when the pulse duration is shorter than collisional relaxation time (CRT). Accordingly, ultrashort-pulsed lasers have been mainly used to study LIPSS, but they unstably irradiate while requiring high costs. Although long-pulsed lasers have low cost and high stability, the phenomena (such as the effect of pulse duration, laser wavelength, and heat) of the LIPSS fabricated using short-pulsed lasers with the pulse duration close to the maximum CRT, which is greater than femtosecond, have not been clarified. However, the nanosecond pulse laser has been reported to produce LIPSS, but those were unclear and ununiform. In this study, the short-pulsed laser with the pulse duration of 20 ps, which is close to the maximum CRT, was employed to clarify the effects of pulse duration and heat on the fabrication of LIPSS and to solve problems associated with ultrashort-pulsed lasers. First, a finite-difference time-domain simulation was developed at 20-ps pulse duration to investigate the effects of irradiation conditions on the electric-field-intensity distribution. Subsequently, experiments were conducted using the 20-ps pulse laser by varying conditions. The aspect ratio of the LIPSS obtained was greater than that of the LIPSS fabricated using ultrashort-pulsed lasers, but LIPSS were not fabricated at 355- and 266-nm laser wavelength. In addition, the short-pulsed laser experienced thermal influences and a cooling material was effective for the fabrication of LIPSS with high-aspect-ratio. This demonstrates the effects of pulse duration close to the CRT and heat on the fabrication of LIPSS.

Multiscale Surface Patterning of Zirconia by Picosecond Pulsed Laser Irradiation

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Yuka Yamamuro ◽  
Tomotaka Shimoyama ◽  
Isao Yamashita ◽  
Jiwang Yan
Keyword(s):  
Phase Transformation ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Surface Patterning ◽  
Yttria Stabilized Zirconia ◽  
Surface Structures ◽  
Stabilized Zirconia ◽  
Periodic Surface ◽  
Thermally Induced ◽  
Pulsed Laser Irradiation

Abstract Irradiation of yttria-stabilized zirconia (YSZ) was performed by a picosecond pulsed laser to investigate the possibility for multiscale surface patterning. Nanoscale laser-induced periodic surface structures (LIPSS) were successfully generated inside microscale grooves over a large surface area under specific conditions. A thermally induced phase transformation of YSZ was identified after laser irradiation, and this phase transformation was restrained by reducing the laser power or the number of irradiations. Moreover, it was found that the generation of LIPSS greatly changed the surface wettability of YSZ. These results demonstrated the possibility of creating zirconia hybrid patterns with high functionality, which may expand the applications of YSZ in industry.

scholarly journals Effect of ultrashort pulsed laser on bond strength of Y-TZP zirconia ceramic to tooth surfaces

2015 ◽  
Vol 34 (3) ◽  
pp. 351-357 ◽  
Author(s):  
Server Mutluay UNAL ◽  
Remzi NIGIZ ◽  
Zelal Seyfioglu POLAT ◽  
Aslıhan USUMEZ
Keyword(s):  
Bond Strength ◽  
Pulsed Laser ◽  
Zirconia Ceramic ◽  
Tooth Surfaces ◽  
Ultrashort Pulsed Laser

scholarly journals Generation of Laser-Induced Periodic Surface Structures on Different Glasses by a Picosecond-Pulsed Laser

Procedia CIRP ◽  
2020 ◽  
Vol 94 ◽  
pp. 924-929
Author(s):  
K. Bischoff ◽  
P. Quigley ◽  
A. Hohnholz ◽  
P. Jäschke ◽  
S. Kaierle
Keyword(s):  
Pulsed Laser ◽  
Surface Structures ◽  
Periodic Surface

scholarly journals Ultra-short-pulsed laser-machined nanogratings of laser-induced periodic surface structures on thin molybdenum layers

2012 ◽  
Vol 6 (1) ◽  
pp. 063528 ◽  
Author(s):  
Davide Scorticati ◽  
Gert-Willem Römer ◽  
Dirk Frederik de Lange ◽  
Bert Huis in ’t Veld
Keyword(s):  
Pulsed Laser ◽  
Surface Structures ◽  
Periodic Surface

Fabrication and Control of Fine Periodic Surface Structures by Short Pulsed Laser

2016 ◽  
Vol 10 (4) ◽  
pp. 639-646 ◽  
Author(s):  
Shuhei Kodama ◽  
◽  
Akihiro Shibata ◽  
Shinya Suzuki ◽  
Keita Shimada ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Periodic Structures ◽  
Pulsed Laser ◽  
Limited Range ◽  
Laser Wavelength ◽  
Surface Structures ◽  
Periodic Surface ◽  
Pitch Length ◽  
Traditional Processing ◽  
And Control

Ultrashort-pulsed laser irradiation is a more efficient approach to the fabrication of fine surface structures than traditional processing methods. However, it has some problems: the equipment expenses usually increase as the pulse shortens, and the process principle has not been clarified completely, although the collisional relaxation time (CRT) is assumed to be a major factor. In this study, a 20-ps pulsed laser was employed to fabricate nanometer-sized periodic structures on a stainless steel alloy, SUS304. The pitch length of the fabricated fine periodic structures was similar to the laser wavelength, and the results suggested that periodic structures could be fabricated within a limited range of the laser fluence. In order to expand the effective fluence range (EFR) and to control the pitch length, laser irradiation was carried out with different workpiece temperatures and the laser wavelengths. In this way, CRT was extended and EFR was expanded by cooling the workpiece, and the pitch lengths were approximately equal to the laser wavelengths. As a result, two things were found: it is easier to fabricate the fine periodic structures by cooling the workpiece, and it is possible to control the pitch length of the fine periodic structures by changing the laser wavelength.

scholarly journals Evolution of Microstructures on Stainless Steel induced by Ultra-Short Laser Ablation

2019 ◽  
Author(s):  
Norbert Ackerl ◽  
Gabriela Fisch ◽  
Janko Auerswald ◽  
Konrad Wegener
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Laser Ablation ◽  
Grain Orientation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Surface Structures ◽  
Periodic Surface ◽  
Processing Window ◽  
Grain Orientations

Ultra-short pulsed laser ablation of stainless steel is accompanied by the evolution of different microstructures. Depending on the fuence, accumulated energy and number of laser passes cones from impurities, laser induced periodic surface structures and conelike protrusion (CLP) evolve at the surface. These often unwanted morphologies can be inhibited by carefully choosing the strategy and laser parameters. Here, the identifed region shows a small processing window fordesigned 515nm sub 1 ps ablation leading to low surface roughness. CLP are still not well understood and here a pre-cursor structure is reported. Subsequently, the CLP growth is grain orientation and polarization dependent and studied in more depth. Preferentially, CLP start to evolve at the (101) grain orientations with linear polarized laser radiation. Moreover, a nanoindentation study reveals robust mechanical properties, which could be beneficial for tribology applications in the hydrodynamic regime.

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