Sintered ceramic product

Details Sintered ceramic product Sintered ceramic product

1989-05-12

1991-05-21

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501104, 501152, C04B 3548

Patent

active

050175327

ABSTRACT:
The invention provides a sintered ceria/zirconia ceramic and a method of making it. The product comprises a substantially homogeneous mixture of 76-92 mole % zirconia, 8-20 mole % ceria and 0.1-1.2 mole % lanthana and/or praseodymia. The method involves heating an artifact comprising said mixture to a temperature in the range 1200.degree.-1700.degree. C.

REFERENCES:
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patent: 4690910 (1987-09-01), Tsukuma et al.
Lange, F. F., "Transformation Toughening", Journal of Materials Science 17 (1982) 255-262.
Coyle, T. W. et al., Am. Ceram. Soc. Bull 62 (1983) 966.
Tsukuma et al., "Strength, Fracture Toughness & Vickers Hardness of CeO.sub.2 -Stabilized Tetragonal ZrO.sub.2 Polycrystals (Ce-TZP)", Journal of Materials Science 20 (1985) 1178-1184.
Tsukuma, Koji "Mech. Properties & Thermal Stability of CeO.sub.2 Containing Tetragonal Zirconia Polycrystals,", Am. Ceram. Soc. Bull., 65 (1986) 1386-1389.
Nettleship, I. et al., "Tetragonal Zirconia Polycrystal (TZP)--A Review", Int. J. High Technology Ceramics 3 (1987) 1-32.
Duh et al., "Study on Rare-Earth-Oxide-Doped Yttria Tetragonal Zirconia", High Tech. Ceramics (Elsevier Science Publishers H. V., Amsterdam (1987) 1281).
Komolikov et al., "High Strength Ceramic From Zirconium Dioxide Partly Stabilized with Ytterbium Oxide", Translated from Ogneupory, No. 8, pp. 20-22, Aug. 1986.
Hanna et al., "Characterization & Densification of Lanthana-Zirconia Powders Prepared by High Temp. Hydrolysis", Rev. Int. Hautes Temper. Refract., Fr., 1985, 22, 168-174.
Hanna, S. B. et al., "Characterization & Densification of Lanthana-Zirconia Powders Prepared by High Temperature Hydrolysis", Journal of Materials Science 21 (1986) 3043-3049.
Bastide, B. et al., "Phase Equilibrium & Martensitic Transformation in Lanthana-Doped Zirconia", J. Am. Ceram. Soc., 71 [6], 449-453, (1988).
Blackburn, S., et al., "Structure-Prop. Relationships for REO PSZ Pieces Pressed from Homogeneous Electrorefined Powders", Advances in Ceramics vol. 24: Science & Technology of Zirconia III (1988) 211-215.

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