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Meccanica

, Volume 51, Issue 2, pp 279–289 | Cite as

Numerical calculation of temperature and surface topology during a laser ablation process for ceramic coatings

  • Peter WeidmannEmail author
  • Ulrich Weber
  • Siegfried Schmauder
  • Giancarlo Pedrini
  • Wolfgang Osten
Computational Micromechanics of Materials

Abstract

In this paper a numerical procedure is presented to calculate a laser ablation process for ceramic thick film coatings. The code is required to cover temperature dependent material data, projected beam intensities and inhomogeneous coating–substrate combinations to calculate the hole shape geometry, the temperature distribution under the surface and the ablation rate per pulse. Therefore, the ablation speed was calculated by an Arrhenius equation while the temperature distribution was simulated by means of the heat conduction equation, which is solvable by a finite differences scheme. Hence, an adaptive mesh is used and the expansion of the code to three spatial dimensions enables the simulation of more complex ablation geometries. The simulation time was held low by introducing actualization frequencies, where critical and time consuming steps were only run if necessary. A validation of the numerical simulation was done by comparing the calculated temperature depth distribution and hole geometry with micrographs of experimental ablations.

Keywords

Laser ablation Ceramic thick film coatings Non-steady heat conduction Residual stress determination 

Notes

Acknowledgments

This work was supported by the German Research Foundation (Deutsche Forschungs Gemeinschaft, DFG) under Grant Nos. Schm 746/120 and OS 111/37.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Peter Weidmann
    • 1
    Email author
  • Ulrich Weber
    • 1
  • Siegfried Schmauder
    • 1
  • Giancarlo Pedrini
    • 2
  • Wolfgang Osten
    • 2
  1. 1.Institute for Materials Testing, Materials Science and Strength of MaterialsUniversity of StuttgartStuttgartGermany
  2. 2.Institute of Applied OpticsUniversity of StuttgartStuttgartGermany

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