Thermal shock resistance and thermal-mechanical processing of sapphire

Thermal shock resistance and thermal-mechanical processing of sapphire

The finite elements method was applied to calculate transient thermal stresses in sapphire with taking into account the crystal's anisotropy, scale factor, temperature function of heat transfer and other properties. The sapphire fracture behaviour as compared to ceramic polycrystalline material...

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Veröffentlicht in:Journal of the European Ceramic Society 2003-03, Vol.23 (3), p.455-468
Hauptverfasser: Lanin, A.G., Muravin, E.L., Popov, V.P., Turchin, V.N.
Format: Artikel
Sprache:eng
Schlagworte:
Al 2O 3
Fracture
Heat treatment
Modelling
Sapphire
Thermal shock resistance
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Zusammenfassung:The finite elements method was applied to calculate transient thermal stresses in sapphire with taking into account the crystal's anisotropy, scale factor, temperature function of heat transfer and other properties. The sapphire fracture behaviour as compared to ceramic polycrystalline materials under heat load, differs due to two factors: (a) twinning type strain at rather low test temperatures
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(02)00093-6