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Fracture toughness KIC analysis of Co-doped 7YSZ

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1179/026708310X12756557336319
AuteurRechercher : ; Rechercher : ; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Aérospatiale
FormatTexte, Article
Sujet7YSZ; Co-doped; Crack geometries; High porosity; Monoclinic zirconia; Non-linear; Tetragonal zirconia; Young's Modulus; Fracture; Fracture testing; Indentation; Vickers hardness; Vickers hardness testing; Ytterbium; Zirconia; Fracture toughness
Résumé
Co-doped samples of 7YSZ with Yb 3+, Ce 4+ and Nb 5+ having high porosity are subject to Vickers hardness testing. Fracture toughness K IC values are obtained by measuring linear and non-linear crack geometries. Three separate means are used to calculate the fracture toughness and to investigate the associated trends. It is confirmed that high amounts of retained tetragonal zirconia improve fracture toughness, while elevated amounts of monoclinic zirconia lower overall fracture toughness. The experimental trend for increasing K IC is Nb:7YSZ<Yb:7YSZ, 7YSZ<Ce:7YSZ; however, this trend is qualitative as the Young's modulus values for different samples are corrected for porosity using an equation that does not generally apply to indentation techniques. © 2011 Institute of Materials, Minerals and Mining.
Date de publication
Dans
  • Materials Science and Technology 27, nº 10 (2011) : 1606–1609.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21271132
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Identificateur de l’enregistrementf3c11bdf-a32d-4c59-aea9-3955c1d21b7b
Enregistrement créé2014-03-24
Enregistrement modifié2020-04-21
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