Effect of surface roughness on the ultrashort pulsed laser ablation fluence threshold of zinc and steel
| Autor: | David Thomas Allan Matthews, Gerardus Richardus, Bernardus, Engelina Römer, Hasib Mustafa, Marek Mezera |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope medicine.medical_treatment General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences Fluence law.invention Ablation threshold Surface roughness Ultrashort pulsed laser law Galvanized steel medicine Composite material Polycrystalline zinc Laser ablation Surfaces and Interfaces General Chemistry Molar absorptivity 021001 nanoscience & nanotechnology Condensed Matter Physics Laser Ablation 0104 chemical sciences Surfaces Coatings and Films Wavelength 0210 nano-technology Titanium stabilized ultra-low carbon steel |
| Zdroj: | Applied Surface Science 488 (2019) Applied Surface Science, 488, 10-21 Applied surface science, 488, 10-21. Elsevier |
| ISSN: | 0169-4332 |
| Popis: | The single and multiple pulse laser ablation threshold of zinc and steel at picosecond laser pulse duration is studied as a function of initial surface roughness at laser wavelengths of 515 and 1030 nm. The initial surface topographies and the resulting crater morphologies are analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Reflectivity measurements of the initial surfaces show increased absorptivity with increasing surface roughness. It was found that the single pulse ablation threshold increases with increasing effective surface area; the latter resulting from surface roughness. Rougher surfaces tend to have a higher degree of incubation as well. From the experimental and simulation results, it appears that the absorbed energy contributes more to residual heat than to material ablation when effective surface area increases. |
| Databáze: | OpenAIRE |
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