Improving contact damage resistance of spinel translucent ceramics through a multi-layer design
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Date
2025-04-01
Authors
Najafzadehkhoee, Aliasghar
Jabr, Abdullah
Talimian, Ali
Papšík, Roman
Drdlík, Daniel
Maca, Karel
Galusek, Dušan
Bermejo, Raul
0000-0003-4545-7779Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
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Abstract
The brittle response of transparent spinel ceramics to contact damage is limiting their application as an alternative to glasses and single crystals. In this work, we explore a strategy to enhance the contact damage resistance of spinel ceramics by embedding alumina layers in a multi-layer architecture. Crack initiation upon Hertzian indentation was investigated in MgAl2O4 - Al2O3 laminates and compared to their corresponding monoliths. Contact stresses during loading were analyzed using finite element simulations by considering the elastic properties of the layers and contact non-linearities. Results were analyzed using Weibull statistics. It was found that the effect of in-plane residual stresses on crack formation in the laminate depends on the disposition of the compressive spinel layers, either at the surface or embedded in the structure. Embedding alumina between spinel layers increased the load-bearing capability before crack initiation by similar to 70 % compared to spinel, offering a promising approach to enhance contact damage resistance.
Description
Citation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. 2025, vol. 45, issue 4, p. 1-9.
https://www.sciencedirect.com/science/article/pii/S0955221924009440
https://www.sciencedirect.com/science/article/pii/S0955221924009440
Document type
Peer-reviewed
Document version
Published version
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Language of document
en
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Comittee
Date of acceptance
Defence
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/