Compositions: ceramic – Ceramic compositions – Refractory
Patent
1980-07-14
1981-11-03
McCarthy, Helen M.
Compositions: ceramic
Ceramic compositions
Refractory
264 60, 264322, 501 1, 501 87, 501 88, 501 94, 501102, 501108, 501126, 501132, 501133, 501153, 501154, C04B 3500, C04B 3510, C04B 3540, C04B 3571
Patent
active
042983851
ABSTRACT:
A sintered ceramic body of high toughness, consisting of an isotropic ceramic matrix (e.g. Al.sub.2 O.sub.3) and at least one therein-dispersed phase (ZrO.sub.2, HzO.sub.2) of ceramic embedment material formed from a powder consisting of particles having an average diameter from 0.3 to 1.25 .mu.m, wherein the ceramic embedment material is present in different enantiotropic solid modifications at the firing temperature of the ceramic body and below the firing temperature, whose densities are substantially different, and the ceramic body is shot through with extremely fine microfractures in high density.
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Claussen, N. "Fracture Toughness of Al.sub.2 O.sub.3 with an Unstabilized ZrO.sub.2 Dispersed Phase", J. Am. Cer. Soc. Jan.-Feb., 1976, 59, pp. 49-51.
Claussen, N. et al. "Toughening of Ceramic Composites by Oriented Nucleation of Microcracks", J. Am. Cer. Soc. 59, pp. 457-458 (Sep.-Oct. 1976).
Claussen Nils
Steeb Jorg
Max-Planck-Gesellschaft zur Forderung Wissenschaften e.V.
McCarthy Helen M.
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