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Experimentelle Untersuchungen zum Einfluß von Rißfeldern auf Festigkeit und Makrorißausbreitung in Al2O3-Keramik

 
: Kleer, G.; Döll, W.; Schönholz, R.

Deutsche Keramische Gesellschaft e.V. -DKG-:
Alumina '92. Symposium Herstellung, Eigenschaften und Verwendung von Aluminiumoxid
1994 (Fortschrittsberichte der Deutschen Keramischen Gesellschaft 9,2)
ISSN: 0177-6983
Alumina <1992, Koblenz>
Deutsch
Konferenzbeitrag
Fraunhofer IWM ()

Abstract
Strength and life time of ceramic materials under mechanical loads are particularly determined by defects and dominating macrocracks induced by the manufacturing process. In order to investigate effects of microcracks systematically which are also present in the material specific oriented microcracks were induced in alumina and the dependency of the strength and the propagation of macrocracks were investigated in 4-point-bending and double torsion experiments. The results obtained from these experiments are discussed referring to model calculations concerning the shielding of the macrocrack by microcracks.

: http://publica.fraunhofer.de/dokumente/PX-13536.html