Laser Structuring of Surfaces

Magistrsko delo obravnava superhidrofobne površine, ki so nastale z laserskim teksturiranjem površin, in vpliv takšnih površin na lepljenje. V literaturi so opisani laserji, ki jih uporabljamo predvsem v industriji, lasersko strukturiranje kovin in nekovin ter lepljeni spoji. Pri eksperimentalnem delu smo najprej nanesli barvo na vzorce, potem smo te vzorce lasersko teksturirali in odstranili barvo. Vzorce smo primerjali med sabo, ter ugotavljali kateri vzorec bi bil najprimernejši glede na čas obdelave in hrapavost. Vsi vzorci so imeli sledi dolbenja. Bolj ko stopnjujemo frekvenco, hitrost obdelave in večkrat kot gremo z laserjem naprej in nazaj, bolj je razvidna smer obdelave. Primerni vzorci (23 %, 80 % in 40 % prekrivanje žarkov) so bili obdelani v obliki mreže z dvakratno potjo žarka v smeri 0° in 90°. Vzorec z 40 % prekrivanjem žarkov je bil najprimernejši, saj je imel visoko hrapavost z enakomerno porazdeljenimi hribčki in dolinami, barva je bila popolnoma odstranjena s površine, čas obdelave je bil razmeroma kratek.The master\u27s thesis deals with superhydrophobic surfaces created by laser texturing of surfaces and the influence of such surfaces on adhesive bonding. The literature describes lasers used mainly in industry, laser structuring of metals and non-metals, and adhesively-bonded joints. In the experimental work, we first applied paint to the samples, then laser-textured these samples and removed the paint. We then compared the samples with each other, and determined which sample would be most appropriate in terms of processing time, and roughness. All samples had traces of pitting. The more we increase the frequency, the processing speed, and the more times we go back and forth with the laser, the more visible was the direction of processing. Suitable samples (23 %, 80 % and 40 % overlap of laser beams) were processed in the form of a grid, twice in the direction of 0 ° and 90 °. Sample with 40 % overlap was the most suitable as it had the biggest roughness with equally deployed hills and valleys, the paint was completely removed from the surface, and the processing time was relatively short