Alumina/zirconia ceramics and method of producing the same

摘要

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 CeO₂ in an amount of 9 to 12 mol % and Y-stabilized zirconia crystal particles which contain Y₂O₃ in 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 mum.