MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Anisotropy of Fracture Toughness of Stabilized Zirconia Investigated by Nano-Identation Method
Hideaki ItoKazuhisa SatoAtsushi UnemotoShin-ichi HashimotoKoji AmezawaTatsuya Kawada
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2018 Volume 59 Issue 1 Pages 23-26

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Abstract

Nano-indentation tests with a Vickers-type diamond tip were carried out on the {100} surface of a single crystal of 10 mol% yttria-stabilized zirconia (10YSZ), (Y2O3)0.1(ZrO2)0.9. By changing the contact angle of the indentation tip against the single crystal sample, the fracture toughness of 10YSZ was investigated as a function of the crystal orientation from <100> to <110> on the {100} surface. It was empirically shown that the fracture toughness of 10YSZ is anisotropic. The fracture toughness of 10YSZ was lowest in the direction of <100> among investigated orientations. This result suggests that mechanical failures in 10YSZ may occur preferentially along the direction of <100>.

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© 2017 The Japan Institute of Metals and Materials
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