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Experimental study of the effect of a laser beam on the morphology of wood surfaces

: Wust, H.; Beyer, E.; Wiedemann, G.; Panzner, M.; Haller, P.

WOOD K PLUS, Kompetenzzentrum für Holzverbundwerkstoffe und Holzchemie, Wien:
Wood based materials. Wood composites and chemistry : International symposium, September 19-20, 2002, Vienna, Austria
Wien, 2002
International Symposium "Wood Based Materials" <2002, Wien>
Conference Paper
Fraunhofer IWS ()

The study reports on fundamental aspects of modification of wood by using a laser beam and relates different parameters such as laser type, intensity, time and focus to the surface morphology that presents ablation or melting processes that con be seen from microscopic observations (SEM). The penetration of water into laser treated surfaces is considerably suppressed. Apart from ablation or sealing of the wood surface, the laser beam can be used to remove microscopical amounts in order to clean or to prepare the surface for coatings by controlling the energy input. The paper shows some applications in the preservation of historic monuments. It is thought that the modification of wooden surfaces by laser beam represents a fundamental technology with many potential applications.