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.

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.

The evolution of surface structures in p-CdTe crystals under pulsed laser irradiation

2004 ◽  
Vol 38 (1) ◽  
pp. 23-26 ◽  
Author(s):  
A. Baidullaeva ◽  
M. B. Bulakh ◽  
A. I. Vlasenko ◽  
A. V. Lomovtsev ◽  
P. E. Mozol’
Keyword(s):  
Laser Irradiation ◽  
Pulsed Laser ◽  
Surface Structures ◽  
Pulsed Laser Irradiation

Thermal and Mechanical Behavior in Laser Trepan Drilling of Yttria-Stabilized Zirconia

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Hong Shen ◽  
Decai Feng
Keyword(s):  
Phase Transformation ◽  
Pulsed Laser ◽  
Laser Drilling ◽  
Yttria Stabilized Zirconia ◽  
Transient Temperature ◽  
Stabilized Zirconia ◽  
Thermomechanical Model ◽  
Cracking Control ◽  
Intrinsic Mechanism ◽  
Laser Trepan Drilling

Cracking control is very important for laser drilling of yttria-stabilized zirconia (YSZ). In this paper, a thermomechanical model is presented to investigate what will be happened in the trepan drilling of YSZ by a picosecond pulsed laser. The thermal model is developed for describing the interaction between laser and YSZ material to obtain the transient temperature. The mechanical model is developed to calculate the stress distribution caused by the phase transformation based on the temperature results. The goal of the present study is to explore the intrinsic mechanism of cracking around the drilled hole from the aspect of the phase transformation in laser drilling of YSZ.

Modification of structural and transport properties in epitaxial YBa2CU3Ox films by pulsed laser irradiation

1993 ◽  
Vol 3 (12) ◽  
pp. 2173-2188
Author(s):  
N. G. Chechenin ◽  
A. V. Chernysh ◽  
V. V. Korneev ◽  
E. V. Monakhov ◽  
B. V. Seleznev
Keyword(s):  
Transport Properties ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Pulsed Laser Irradiation
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