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Pastor Caño, Jose Ignacio ORCID: https://orcid.org/0000-0003-3561-5999, Martin Sanz, Antonia
ORCID: https://orcid.org/0000-0003-1291-948X, Molina Aldareguía, Jon M.
ORCID: https://orcid.org/0000-0003-3508-6003, Llorca Martinez, Francisco Javier
ORCID: https://orcid.org/0000-0002-3122-7879, Oliete Terraz, Patricia Beatriz, Larrea, Angel, Peña Torre, José Ignacio, Orera, V.M. and Arenal, Raúl
(2013).
Superplastic deformation of directionally solidified nanofibrillar Al2O3-Y3Al5O12-ZrO2 eutectics.
"Journal of the European Ceramic Society", v. 33
(n. 13-14);
pp. 2579-2586.
ISSN 0955-2219.
https://doi.org/10.1016/j.jeurceramsoc.2013.03.033.
Title: | Superplastic deformation of directionally solidified nanofibrillar Al2O3-Y3Al5O12-ZrO2 eutectics |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Journal of the European Ceramic Society |
Date: | November 2013 |
ISSN: | 0955-2219 |
Volume: | 33 |
Subjects: | |
Faculty: | E.T.S.I. Caminos, Canales y Puertos (UPM) |
Department: | Ciencia de los Materiales |
Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
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Nanofibrillar Al2O3–Y3Al5O12–ZrO2 eutectic rods were manufactured by directional solidification from the melt at high growth rates in an inert atmosphere using the laser-heated floating zone method. Under conditions of cooperative growth, the ternary eutectic presented a homogeneous microstructure, formed by bundles of single-crystal c-oriented Al2O3 and Y3Al5O12 (YAG) whiskers of ≈100 nm in width with smaller Y2O3-doped ZrO2 (YSZ) whiskers between them. Owing to the anisotropic fibrillar microstructure, Al2O3–YAG–YSZ ternary eutectics present high strength and toughness at ambient temperature while they exhibit superplastic behavior at 1600 K and above. Careful examination of the deformed samples by transmission electron microscopy did not show any evidence of dislocation activity and superplastic deformation was attributed to mass-transport by diffusion within the nanometric domains. This combination of high strength and toughness at ambient temperature together with the ability to support large deformations without failure above 1600 K is unique and shows a large potential to develop new structural materials for very high temperature structural applications.
Item ID: | 26558 |
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DC Identifier: | https://oa.upm.es/26558/ |
OAI Identifier: | oai:oa.upm.es:26558 |
DOI: | 10.1016/j.jeurceramsoc.2013.03.033 |
Official URL: | http://www.sciencedirect.com/science/article/pii/S... |
Deposited by: | Memoria Investigacion |
Deposited on: | 26 May 2014 11:36 |
Last Modified: | 01 Dec 2015 23:56 |