An Experimental Investigation of Controlled Changes in Wettability of Laser-Treated Surfaces after Various Post Treatment Methods
| Autor: | Šimon Syrovátka, Tomáš Primus, Jan Brajer, Pavel Zeman, Pavel Kožmín |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
0209 industrial biotechnology Materials science Annealing (metallurgy) Ultra-high vacuum wettability 02 engineering and technology Fluence Article law.invention Contact angle chemistry.chemical_compound 020901 industrial engineering & automation law surface General Materials Science Composite material Microscopy QC120-168.85 Ti6Al4V alloy QH201-278.5 post-processing Polyethylene Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology Laser TK1-9971 laser Descriptive and experimental mechanics chemistry Vacuum chamber Electrical engineering. Electronics. Nuclear engineering Wetting TA1-2040 0210 nano-technology |
| Zdroj: | Materials Volume 14 Issue 9 Materials, Vol 14, Iss 2228, p 2228 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14092228 |
| Popis: | In this paper, a quick nanosecond laser micro structuring process was employed to change the surface wettability of Ti6Al4V alloy. The same laser structuring method was used throughout, but with varying input fluence. The laser processing parameters resulted in high surface melting. After laser treatment, four post-processing methods were used, namely high vacuum, low temperature annealing, storage in a polyethylene bag, and storage in ambient air. Subsequently, the water droplet contact angle was measured over a long time period of 55 days. The results show that the sample stored in ambient air remained hydrophilic. On the other hand, the sample post-processed in a vacuum chamber behaved hydrophobically with a contact angle of approximately 150°. Other post-processing did not lead to specific wettability behavior. After wettability testing, all samples were cleaned ultrasonically in distilled water. This cleaning process led to annulation of all obtained properties through post-processing. In summary, this paper shows that it is more important to study surface chemistry than topography in terms of effects on wettability. Moreover, surface wettability can be controlled by laser structuring, post-processing, and surface cleaning. |
| Databáze: | OpenAIRE |
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