High-temperature fracture behaviour of layered alumina ceramics with textured microstructure
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In: Journal of the European Ceramic Society, Vol. 43.2023, No. 7, 07.2023, p. 2917-2927.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - High-temperature fracture behaviour of layered alumina ceramics with textured microstructure
AU - Schlacher, Josef Christian
AU - Chlup, Zdeněk
AU - Hofer, Anna-Katharina
AU - Bermejo, Raul
N1 - Publisher Copyright: © 2022 The Authors
PY - 2023/7
Y1 - 2023/7
N2 - Mimicking the damage tolerance of biological materials such as nacre has been realised in textured layered alumina ceramics, showing improved reliability as well as fracture resistance at room temperature. In this work, the fracture behaviour of alumina ceramics with textured microstructure and laminates with embedded textured layers are investigated under uniaxial bending tests at elevated temperatures (up to 1200 °C). At temperatures higher than 800 °C monolithic textured alumina favours crack deflection along the basal grain boundaries, corresponding to the transition from brittle to more ductile behaviour. In the case of laminates, the loss of compressive residual stresses is counterbalanced by the textured microstructure, effective up to 1200 °C. This study demonstrates the potential of tailoring microstructure and architecture in ceramics to enhance damage tolerance within a wide range of temperatures.
AB - Mimicking the damage tolerance of biological materials such as nacre has been realised in textured layered alumina ceramics, showing improved reliability as well as fracture resistance at room temperature. In this work, the fracture behaviour of alumina ceramics with textured microstructure and laminates with embedded textured layers are investigated under uniaxial bending tests at elevated temperatures (up to 1200 °C). At temperatures higher than 800 °C monolithic textured alumina favours crack deflection along the basal grain boundaries, corresponding to the transition from brittle to more ductile behaviour. In the case of laminates, the loss of compressive residual stresses is counterbalanced by the textured microstructure, effective up to 1200 °C. This study demonstrates the potential of tailoring microstructure and architecture in ceramics to enhance damage tolerance within a wide range of temperatures.
UR - http://www.scopus.com/inward/record.url?scp=85142727265&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2022.11.046
DO - 10.1016/j.jeurceramsoc.2022.11.046
M3 - Article
VL - 43.2023
SP - 2917
EP - 2927
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 7
ER -
