The effect of Vickers hardness indentations on the fracture mode in 8 mol% yttria-stabilised zirconia

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The effect of Vickers hardness indentations on the fracture mode in 8 mol% yttria-stabilised zirconia. / Vandermeulen, Willy; Bosch, Rik-Wouter; Snijkers, Frans; Gavrilov, Serguei (Peer reviewer).

In: Journal of Materials Science, Vol. 50, No. 7, 04.2015, p. 2932-2943.

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@article{f20b441eb916423e9e2de8a71d2159fc,
title = "The effect of Vickers hardness indentations on the fracture mode in 8 mol% yttria-stabilised zirconia",
abstract = "Cubic 8 mol% Y2O3-stabilised ZrO2 is well known for its good oxygen conductivity and therefore it is used in fuel cells, as oxygen sensor for liquid metals and as pH sensor in high temperature water. As a part of its fracture toughness assessment, the crack system caused by Vickers hardness indentations was examined by breaking specimens along an indentation diagonal. It was found that, although the normally observed fracture mode is transgranular, intergranular fracture occurred in the zone below an indentation. Annealing the specimen above 900 C before breaking caused the disappearance of this effect. The intergranular fracture mode was explained by the combined effect of plastic deformation under the indentation and environmental humidity. Annealing is expected to cause restoration to the un-deformed structure. Observations on the intergranular and transgranular cracking pattern, slow crack growth occurrence and step formation at the fracture surface, are reported.",
keywords = "YSZ sensors, hardness indentations, intergranular fracture",
author = "Willy Vandermeulen and Rik-Wouter Bosch and Frans Snijkers and Serguei Gavrilov",
note = "Score = 10",
year = "2015",
month = apr,
doi = "10.1007/s10853-015-8858-7",
language = "English",
volume = "50",
pages = "2932--2943",
journal = "Journal of Materials Science",
issn = "1573-4803",
publisher = "Springer",
number = "7",

}

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TY - JOUR

T1 - The effect of Vickers hardness indentations on the fracture mode in 8 mol% yttria-stabilised zirconia

AU - Vandermeulen, Willy

AU - Bosch, Rik-Wouter

AU - Snijkers, Frans

A2 - Gavrilov, Serguei

N1 - Score = 10

PY - 2015/4

Y1 - 2015/4

N2 - Cubic 8 mol% Y2O3-stabilised ZrO2 is well known for its good oxygen conductivity and therefore it is used in fuel cells, as oxygen sensor for liquid metals and as pH sensor in high temperature water. As a part of its fracture toughness assessment, the crack system caused by Vickers hardness indentations was examined by breaking specimens along an indentation diagonal. It was found that, although the normally observed fracture mode is transgranular, intergranular fracture occurred in the zone below an indentation. Annealing the specimen above 900 C before breaking caused the disappearance of this effect. The intergranular fracture mode was explained by the combined effect of plastic deformation under the indentation and environmental humidity. Annealing is expected to cause restoration to the un-deformed structure. Observations on the intergranular and transgranular cracking pattern, slow crack growth occurrence and step formation at the fracture surface, are reported.

AB - Cubic 8 mol% Y2O3-stabilised ZrO2 is well known for its good oxygen conductivity and therefore it is used in fuel cells, as oxygen sensor for liquid metals and as pH sensor in high temperature water. As a part of its fracture toughness assessment, the crack system caused by Vickers hardness indentations was examined by breaking specimens along an indentation diagonal. It was found that, although the normally observed fracture mode is transgranular, intergranular fracture occurred in the zone below an indentation. Annealing the specimen above 900 C before breaking caused the disappearance of this effect. The intergranular fracture mode was explained by the combined effect of plastic deformation under the indentation and environmental humidity. Annealing is expected to cause restoration to the un-deformed structure. Observations on the intergranular and transgranular cracking pattern, slow crack growth occurrence and step formation at the fracture surface, are reported.

KW - YSZ sensors

KW - hardness indentations

KW - intergranular fracture

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_139900

UR - http://knowledgecentre.sckcen.be/so2/bibref/12803

U2 - 10.1007/s10853-015-8858-7

DO - 10.1007/s10853-015-8858-7

M3 - Article

VL - 50

SP - 2932

EP - 2943

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 1573-4803

IS - 7

ER -

ID: 249262