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Publisher DOI: 10.1111/jace.18811
Title: Unraveling the role of shell thickness and pore size on the mechanical properties of ceramic-based macroporous structures
Language: English
Authors: Gomez Gomez, Alberto 
Winhard, Benedikt 
Lilleodden, Erica 
Huber, Norbert  
Pagnan Furlan, Kaline  
Keywords: atomic layer deposition; ceramics; macroporous structures; mechanical metamaterial
Issue Date: 1-Oct-2022
Publisher: Wiley-Blackwell
Source: Journal of the American Ceramic Society 106 (2): 1273-1286 (2022)
Abstract (english): 
Macroporous structures are of interest for several technological applications such as catalysis, sensors, filters, membranes, batteries, energy conversion devices, structural colors, and reflective thermal barrier coatings. Ceramic-based inverse opal macroporous structures are especially interesting for high-temperature applications. However, the interrelation between the structural parameters, mechanical properties, and thermal stability of such structures is not yet clarified. In this work, we analyzed the mechanical properties as well as the thermal stability of aluminum oxide inverse opal three-dimensional macroporous structures with different macropore sizes and shell thicknesses produced by atomic layer deposition. Our results show that the structures’ thermal stability increased with increasing shell thickness and macropore size, however, their higher stability was not linked to their mechanical properties. To be able to explain this unexpected behavior, finite element modeling simulations were performed, showing that bending stresses became more pronounced with increasing shell thickness, potentially creating additional critical sites for crack initiation and consequent structural failure.
DOI: 10.15480/882.4795
ISSN: 1551-2916
Journal: Journal of the American Ceramic Society 
Institute: Keramische Hochleistungswerkstoffe M-9 
Werkstoffphysik und -technologie M-22 
Integrated Ceramic-based Materials Systems M-EXK3 
Document Type: Article
Project: SFB 986: Maßgeschneiderte Multiskalige Materialsysteme - M3 
Projekt DEAL 
License: CC BY-NC 4.0 (Attribution-NonCommercial) CC BY-NC 4.0 (Attribution-NonCommercial)
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