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Zirconia ceramics and method for producing same

  • US 4,977,114 A
  • Filed: 11/17/1989
  • Issued: 12/11/1990
  • Est. Priority Date: 11/28/1986
  • Status: Expired due to Fees
First Claim
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1. Zirconia ceramics which contain 7-12 mol% of cerium oxide and 2-7 mol% of magnesium oxide and which have an average crystal grain size of 1 μ

  • m or less, at least 80 mol% of the crystal grains being tetragonal grains and the balance being monoclinic grains, and have a bending strength of at least 100 kg/mm2, a fracture toughness of at least 10 Mnm-1.5 and a Vickers hardness of at least 1000 kg/mm2.

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