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Comparisons between thermal modeling and experiments: effects of substrate preheating

K. Dai (Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA)
X‐X. Li (Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA)
L.L. Shaw (Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut, USA)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 1 February 2004

1186

Abstract

A three‐dimensional thermal finite element model including the effect of the powder‐to‐solid transition has been developed to investigate the transient temperature distribution and effects of substrate preheating during laser densification of dental powder bed for the layer‐by‐layer fabrication. The model encompasses the effects of the temperature‐ and porosity‐dependent thermal conduction and radiation as well as the temperature‐dependent natural convection. Substrate preheating is found to be important in preventing the formation of cracks in the dental porcelain body during laser densification. The simulation results are found to match the experiments very well.

Keywords

Citation

Dai, K., Li, X. and Shaw, L.L. (2004), "Comparisons between thermal modeling and experiments: effects of substrate preheating", Rapid Prototyping Journal, Vol. 10 No. 1, pp. 24-34. https://doi.org/10.1108/13552540410512507

Publisher

:

Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited

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