Anisotropy of fracture toughness of stabilized zirconia investigated by nano-identation method

Hideaki Ito, Kazuhisa Sato, Atsushi Unemoto, Shin Ichi Hashimoto, Koji Amezawa, Tatsuya Kawada

Research output: Contribution to journalArticle

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>.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalMaterials Transactions
Volume59
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Anisotropy
  • Fracture toughness
  • Nano-indentation
  • Yttria-stabilized Zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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