Kyocera Corporation

Shugo Onitsuka

Kunihide Shikata

Hiroaki Seno

Yucong Wang

Wang Yucong

Composite ceramics having a high strength, a high toughness and an excellent abrasion resistance, and a method of producing the same. The composite ceramics comprises 10 to 30 mass % of a zirconia crystal phase including Ce-stabilized zirconia crystal particles which contain CeOin an amount of 9 to 12 mol % and Y-stabilized zirconia crystal particles which contain YOin an amount of 2.8 to 4.5 mol %; and 70 to 90 mass % of an alumina crystal phase, the zirconia crystal phase having an average crystal particle size of not larger than 1 &#x3bc;m.

Alumina/zirconia ceramics and method of producing the same

Alumina/zirconia ceramics containing AlOin an amount of not less than 65 mass % and ZrOin an amount of 4 to 34 mass %, and further containing TiO, MgO and SiO. The ceramics effectively suppresses the growth of shape isotropic particles of alumina, suppresses the growth of zirconia particles, and has a high strength and a high hardness. Besides, the ceramics containing SrO features a high fracture toughness.

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Kirishima, Japan

Shugo Onitsuka