Hannover 2010 – wissenschaftliches Programm
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K: Fachverband Kurzzeitphysik
K 6: Poster
K 6.7: Poster
Donnerstag, 11. März 2010, 16:30–19:00, Lichthof
Microstructuring of Various Materials using Femtosecond Laser Pulses — •Andy Engel1, Manuel Pfeiffer1, Steffen Weißmantel1, Hagen Grüttner1, and Günter Reiße2 — 1Hochschule Mittweida, Technikumplatz 17, 09648 Mittweida, Germany — 2Laserinstitut Mittelsachsen e.V., Technikumplatz 17, 09648 Mittweida, Germany
New results on three-dimensional micro-structuring of tungsten carbide hard metal, steel, copper and brass using femtosecond laser pulses will be presented. For the investigations, a largely automated high-precision fs-laser micromachining station was used. The fs-laser beam is focussed onto the sample surface using different objec-tives. The investigations of the ablation behaviour of the various materials in dependence of the laser processing parameters will be presented in the first part of the presentation. In the second part, complex 3D microstructures with a variety of geometries and resolutions down to a few micrometers showing smooth side walls as well as steep wall angles and the parameters which were found to be optimum for the micro-structuring of each material will be presented. It will be shown that ultrashort laser pulses are suitable for high-precision micromachining of metals. Nearly no heat affected zones next to the laser processed microstructures and, in the case of the sintered hard metal, no decomposition or segregation due to the fs-laser action was observed.