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TECHNICAL PAPERS: Thermal Systems

Thermal Analysis of Laser-Densified Dental Porcelain Bodies: Modeling and Experiments

[+] Author and Article Information
K. Dai, X. Li, L. Shaw

Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA

J. Heat Transfer 126(5), 818-825 (Nov 16, 2004) (8 pages) doi:10.1115/1.1795812 History: Received September 23, 2003; Revised June 30, 2004; Online November 16, 2004
Copyright © 2004 by ASME
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References

Figures

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Finite element model developed to simulate the temperature field during laser densification of the dental porcelain body
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Comparison between the experimental and simulated values of the pyrometer temperature as a function of the location of the scanning laser beam with a nominal surface temperature of 1373 K and substrate preheating to 673 K (Case I)
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Comparison between the experimental and simulated incident laser power as a function of the location of the scanning laser beam with a nominal surface temperature of 1273 K and αa=0.41 (Case II)
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(a) The simulated temperature distribution in the powder bed at the cross section of X=6.75 mm when the laser beam scans to this location with a nominal surface temperature of 1373 K and substrate preheating to 673 K (Case I), and (b) the simulated temperature distribution on the surface of the porcelain body at the cross section of X=6.75 mm and the matched Gaussian function
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The temperature distribution and microstructure measured experimentally at the cross section of a porcelain body perpendicular to the laser scan direction during laser densification with a nominal surface temperature of 1373 K and substrate preheating to 673 K (Case I)
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(a) The simulated temperature distribution and (b) the microstructure determined experimentally at the cross section of a porcelain body perpendicular to the laser scan direction during laser densification with a nominal surface temperature of 1273 K (Case II)
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(a) The simulated temperature distribution and (b) the microstructure determined experimentally at the cross section of a porcelain body perpendicular to the laser scan direction during laser densification with a nominal surface temperature of 1173 K (Case III)
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The simulated temperature distribution at the cross section of a porcelain body perpendicular to the laser scan direction during laser densification with a nominal surface temperature of 1223 K (Case IV)

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