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Trunec, Martin; Chlup, Zdenek
Scripta materialia, 07/2009, Letnik: 61, Številka: 1Journal Article
Fracture toughness of nanocrystalline zirconia ceramic stabilized with 1.5 mol.% Y 2O 3 was measured and compared with fracture toughness of submicrometer-grained zirconia ceramics stabilized with 3 mol.% Y 2O 3. It was found that nanocrystalline ceramics demonstrated higher fracture toughness than submicrometer-grained zirconia ceramics with both optimized and common grain sizes. The high fracture toughness of nanocrystalline zirconia was confirmed by two different testing methods: indentation method (15.5 MPa m 0.5) and chevron notched beam method (7.9 MPa m 0.5).
