Improving contact damage resistance of spinel translucent ceramics through a multi-layer design
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In: Journal of the European Ceramic Society, Vol. 45.2025, No. 4, 117071, 13.11.2024.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Improving contact damage resistance of spinel translucent ceramics through a multi-layer design
AU - Najafzadehkhoee, Aliasghar
AU - Jabr, Abdullah
AU - Talimian, Ali
AU - Papsik, Roman
AU - Drdlik, Daniel
AU - Maca, Karel
AU - Galusek, Dušan
AU - Bermejo, Raul
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/11/13
Y1 - 2024/11/13
N2 - 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 ∼70 % compared to spinel, offering a promising approach to enhance contact damage resistance.
AB - 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 ∼70 % compared to spinel, offering a promising approach to enhance contact damage resistance.
KW - Contact damage
KW - Hertzian indentation
KW - Multi-layers
KW - Residual stresses
KW - Transparent
UR - http://www.scopus.com/inward/record.url?scp=85209236424&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/science/article/pii/S0955221924009440
U2 - 10.1016/j.jeurceramsoc.2024.117071
DO - 10.1016/j.jeurceramsoc.2024.117071
M3 - Article
AN - SCOPUS:85209236424
VL - 45.2025
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 4
M1 - 117071
ER -
