Superplastic deformation of directionally solidified nanofibrillar Al2O3-Y3Al5O12-Zr O2 eutectics
Pastor, J.Y. ; Martín, A. ; Molina-Aldareguía, J.M. ; LLorca, J. ; Oliete, P.B. (Universidad de Zaragoza) ; Larrea, A. (Universidad de Zaragoza) ; Peña, J.I. (Universidad de Zaragoza) ; Orera, V.M. ; Arenal, R.
Resumen: 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.
Idioma: Inglés
DOI: 10.1016/j.jeurceramsoc.2013.03.033
Año: 2013
Publicado en: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 33, 13-14 (2013), 2579-2586
ISSN: 0955-2219
Factor impacto JCR: 2.307 (2013)
Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 2 / 25 = 0.08 (2013) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2009-13979
Financiación: info:eu-repo/grantAgreement/EUR/NMP4-SL-2008-213669-ENSEMBLE
Tipo y forma: Article (PostPrint)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.
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Idioma: Inglés
DOI: 10.1016/j.jeurceramsoc.2013.03.033
Año: 2013
Publicado en: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 33, 13-14 (2013), 2579-2586
ISSN: 0955-2219
Factor impacto JCR: 2.307 (2013)
Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 2 / 25 = 0.08 (2013) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2009-13979
Financiación: info:eu-repo/grantAgreement/EUR/NMP4-SL-2008-213669-ENSEMBLE
Tipo y forma: Article (PostPrint)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material. Exportado de SIDERAL (2017-05-03-14:22:41)
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Record created 2017-04-05, last modified 2017-05-03