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Mechanical properties and failure behavior of unidirectional porous ceramics

We show that the honeycomb out-of-plane model derived by Gibson and Ashby can be applied to describe the compressive behavior of unidirectional porous materials. Ice-templating allowed us to process samples with accurate control over pore volume, size, and morphology. These samples allowed us to eva...

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Autores principales: Seuba, Jordi, Deville, Sylvain, Guizard, Christian, Stevenson, Adam J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4830974/
https://www.ncbi.nlm.nih.gov/pubmed/27075397
http://dx.doi.org/10.1038/srep24326
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author Seuba, Jordi
Deville, Sylvain
Guizard, Christian
Stevenson, Adam J.
author_facet Seuba, Jordi
Deville, Sylvain
Guizard, Christian
Stevenson, Adam J.
author_sort Seuba, Jordi
collection PubMed
description We show that the honeycomb out-of-plane model derived by Gibson and Ashby can be applied to describe the compressive behavior of unidirectional porous materials. Ice-templating allowed us to process samples with accurate control over pore volume, size, and morphology. These samples allowed us to evaluate the effect of this microstructural variations on the compressive strength in a porosity range of 45–80%. The maximum strength of 286 MPa was achieved in the least porous ice-templated sample (P(%) = 49.9), with the smallest pore size (3 μm). We found that the out-of-plane model only holds when buckling is the dominant failure mode, as should be expected. Furthermore, we controlled total pore volume by adjusting solids loading and sintering temperature. This strategy allows us to independently control macroporosity and densification of walls, and the compressive strength of ice-templated materials is exclusively dependent on total pore volume.
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spelling pubmed-48309742016-04-19 Mechanical properties and failure behavior of unidirectional porous ceramics Seuba, Jordi Deville, Sylvain Guizard, Christian Stevenson, Adam J. Sci Rep Article We show that the honeycomb out-of-plane model derived by Gibson and Ashby can be applied to describe the compressive behavior of unidirectional porous materials. Ice-templating allowed us to process samples with accurate control over pore volume, size, and morphology. These samples allowed us to evaluate the effect of this microstructural variations on the compressive strength in a porosity range of 45–80%. The maximum strength of 286 MPa was achieved in the least porous ice-templated sample (P(%) = 49.9), with the smallest pore size (3 μm). We found that the out-of-plane model only holds when buckling is the dominant failure mode, as should be expected. Furthermore, we controlled total pore volume by adjusting solids loading and sintering temperature. This strategy allows us to independently control macroporosity and densification of walls, and the compressive strength of ice-templated materials is exclusively dependent on total pore volume. Nature Publishing Group 2016-04-14 /pmc/articles/PMC4830974/ /pubmed/27075397 http://dx.doi.org/10.1038/srep24326 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Seuba, Jordi
Deville, Sylvain
Guizard, Christian
Stevenson, Adam J.
Mechanical properties and failure behavior of unidirectional porous ceramics
title Mechanical properties and failure behavior of unidirectional porous ceramics
title_full Mechanical properties and failure behavior of unidirectional porous ceramics
title_fullStr Mechanical properties and failure behavior of unidirectional porous ceramics
title_full_unstemmed Mechanical properties and failure behavior of unidirectional porous ceramics
title_short Mechanical properties and failure behavior of unidirectional porous ceramics
title_sort mechanical properties and failure behavior of unidirectional porous ceramics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4830974/
https://www.ncbi.nlm.nih.gov/pubmed/27075397
http://dx.doi.org/10.1038/srep24326
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