Title: Numerical modelling of the laser-surface interaction during laser-induced modification processes of ceramic substrates

Authors: M. Rohde

Addresses: Forschungszentrum Karlsruhe GmbH, Institute for Materials Research I, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Abstract: Laser-supported processes can be used to modify the electrical and thermal properties of ceramic substrates locally. These processes are characterised by a strong thermal interaction between the laser beam and the ceramic surface. This interaction leads to localised melting. During the dynamic melting process, an additive material is injected into the melt pool in order to modify the physical properties. The heat and mass transfer during this dynamic melting and solidification process has been studied numerically in order to identify the dominating process parameters. Simulation tools based on a finite volume method have been developed to describe the heat transfer, fluid flow and phase change during the melting and solidification of the ceramic. The results of the calculation have been validated against experimental results.

Keywords: dynamic melting; solidification; heat transport; particle distribution; numerical modelling; laser-surface interaction; laser induced modification; ceramic substrates; electrical properties; thermal properties; heat transfer; mass transfer; finite volume method; fluid flow; phase change; simulation.

DOI: 10.1504/IJMMP.2008.016948

International Journal of Microstructure and Materials Properties, 2008 Vol.3 No.1, pp.113 - 125

Available online: 31 Jan 2008 *

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