Thickness effect in thermal shock of alumina ceramics

The thermal shock behavior of alumina is investigated, giving attention to the effect of thickness on the driving force for cracking. Two phenomena are found to cause the increased temperature required to initiate cracking in thin ceramics specimens: a variation of Delta-T exp C as a function of spe...

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Veröffentlicht in:	Scripta materialia 2000-04, Vol.42 (8), p.819-825
Hauptverfasser:	Sherman, Dov, Schlumm, Doron
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM OXIDES Bending stresses Ceramics Condensed matter: structure, mechanical and thermal properties CRACKS CRITICAL TEMPERATURE Critical temperatures Exact sciences and technology Heat capacities of solids MATERIALS SCIENCE NUMERICAL ANALYSIS Physics STRESSES Thermal expansion thermomechanical effects and density Thermal properties of condensed matter Thermal properties of crystalline solids THERMAL SHOCK Thickness effect VALIDATION
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Beschreibung
Zusammenfassung:	The thermal shock behavior of alumina is investigated, giving attention to the effect of thickness on the driving force for cracking. Two phenomena are found to cause the increased temperature required to initiate cracking in thin ceramics specimens: a variation of Delta-T exp C as a function of specimen thickness, and an inability to build high thermal differences in thin specimens. (AIAA)
ISSN:	1359-6462 1872-8456
DOI:	10.1016/S1359-6462(99)00371-1