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Load Dependence of Hardness in Sintered Submicrometer Al2O3 and ZrO2

Lastabhängigkeit der Härte in gesinterter Al2O3- und ZrO2-Keramik mit Submikrometer-Gefüge
 
: Krell, A.

:

Journal of the American Ceramic Society 78 (1995), Nr.5, S.1417-1419
ISSN: 0002-7820
Englisch
Zeitschriftenaufsatz
Fraunhofer IKTS ()
Al2O3; grain size; hardness; Härte; Korngröße; Prüflast; sintered alumina; Sinterkorund; testing load; tetragonal ZrO2 polycrystal; tetragonal ZrO2-Polykristall

Abstract
Monolithic alumina bodies with a grain size of 0.5 micrometer and submicron tetragonal ZrO2(3 mol-percent Y2O3) polycrystals were produced and investigated. With decreasing indentation load, the hardness increases but may again decrease below about 5 N; relevant measurements require the application of fairly high loads. Decreasing grain sizes increase the hardness of alumina and zirconia ceramics even for very small grain sizes in the submicron range .

: http://publica.fraunhofer.de/dokumente/PX-22204.html