Yttria-stabilized zirconia (Y-TZP) ceramics with a drastically reduced yttria content have been introduced by different manufacturers, aiming at improving the damage tolerance of ceramic components. In this study, an alumina-doped 1.5Y-TZP was axially pressed, pressureless sintered in air at 1250–1400 °C for 2 h and characterized with respect to mechanical properties, microstructure, and phase composition. The material exhibits a combination of a high strength of 1000 MPa and a high toughness of 8.5–10 MPa√m. The measured fracture toughness is, however, extremely dependent on the measurement protocol. Direct crack length measurements overestimate toughness due to trapping effects. The initially purely tetragonal material has a high transformability of >80%, the transformation behavior is predominantly dilational, and the measured R-curve-related toughness increments are in good agreement with the transformation toughness increments derived from XRD data.
%0 Journal Article
%1 ceramics7030070
%A Kern, Frank
%A Osswald, Bettina
%D 2024
%J Ceramics
%K ifkb ifkb-ob
%N 3
%P 1066--1084
%R 10.3390/ceramics7030070
%T Mechanical Properties of an Extremely Tough 1.5 mol% Yttria-Stabilized Zirconia Material
%U https://www.mdpi.com/2571-6131/7/3/70
%V 7
%X Yttria-stabilized zirconia (Y-TZP) ceramics with a drastically reduced yttria content have been introduced by different manufacturers, aiming at improving the damage tolerance of ceramic components. In this study, an alumina-doped 1.5Y-TZP was axially pressed, pressureless sintered in air at 1250–1400 °C for 2 h and characterized with respect to mechanical properties, microstructure, and phase composition. The material exhibits a combination of a high strength of 1000 MPa and a high toughness of 8.5–10 MPa√m. The measured fracture toughness is, however, extremely dependent on the measurement protocol. Direct crack length measurements overestimate toughness due to trapping effects. The initially purely tetragonal material has a high transformability of >80%, the transformation behavior is predominantly dilational, and the measured R-curve-related toughness increments are in good agreement with the transformation toughness increments derived from XRD data.
@article{ceramics7030070,
abstract = {Yttria-stabilized zirconia (Y-TZP) ceramics with a drastically reduced yttria content have been introduced by different manufacturers, aiming at improving the damage tolerance of ceramic components. In this study, an alumina-doped 1.5Y-TZP was axially pressed, pressureless sintered in air at 1250–1400 °C for 2 h and characterized with respect to mechanical properties, microstructure, and phase composition. The material exhibits a combination of a high strength of 1000 MPa and a high toughness of 8.5–10 MPa√m. The measured fracture toughness is, however, extremely dependent on the measurement protocol. Direct crack length measurements overestimate toughness due to trapping effects. The initially purely tetragonal material has a high transformability of >80%, the transformation behavior is predominantly dilational, and the measured R-curve-related toughness increments are in good agreement with the transformation toughness increments derived from XRD data.},
added-at = {2024-08-21T17:36:19.000+0200},
author = {Kern, Frank and Osswald, Bettina},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/24b3ab5aa5119b751a702fa5e9bc959e1/bowald},
doi = {10.3390/ceramics7030070},
interhash = {18fed716d5dab6831667b1bfcd2f95a9},
intrahash = {4b3ab5aa5119b751a702fa5e9bc959e1},
issn = {2571-6131},
journal = {Ceramics},
keywords = {ifkb ifkb-ob},
number = 3,
pages = {1066--1084},
timestamp = {2024-08-21T17:36:19.000+0200},
title = {Mechanical Properties of an Extremely Tough 1.5 mol% Yttria-Stabilized Zirconia Material},
url = {https://www.mdpi.com/2571-6131/7/3/70},
volume = 7,
year = 2024
}
