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Synchrotron X-ray powder diffraction study of the tetragonal-cubic phase transition in nanostructured ZrO2-Sc2O3 solid solutions

Published online by Cambridge University Press:  06 March 2012

Paula M. Abdala ,
Diego G. Lamas ,
Mária E. Fernández de Rapp ,
Noemí E. Walsöe de Reca ,
Aldo F. Craievich  and
Márcia C. A. Fantini
Paula M. Abdala
Affiliation:
Centro de Investigaciones en Sólidos (CINSO), Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas-Consejo Nacional de Investigaciones Científicas y Técnicas (CITEFA-CONICET), J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires, Argentina
Diego G. Lamas
Affiliation:
Centro de Investigaciones en Sólidos (CINSO), Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas-Consejo Nacional de Investigaciones Científicas y Técnicas (CITEFA-CONICET), J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires, Argentina
Mária E. Fernández de Rapp
Affiliation:
Centro de Investigaciones en Sólidos (CINSO), Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas-Consejo Nacional de Investigaciones Científicas y Técnicas (CITEFA-CONICET), J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires, Argentina
Noemí E. Walsöe de Reca
Affiliation:
Centro de Investigaciones en Sólidos (CINSO), Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas-Consejo Nacional de Investigaciones Científicas y Técnicas (CITEFA-CONICET), J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires, Argentina
Aldo F. Craievich
Affiliation:
Instituto de Física, Universidade de São Paulo, Rua do Matão Travessa R 187, 05508-900 São Paulo, São Paulo, Brazil
Márcia C. A. Fantini
Affiliation:
Instituto de Física, Universidade de São Paulo, Rua do Matão Travessa R 187, 05508-900 São Paulo, São Paulo, Brazil
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Abstract

The transition between tetragonal and cubic phases in nanostructured ZrO2-Sc2O3 solid solutions by high-temperature X-ray powder diffraction using synchrotron radiation is presented. ZrO2-8 and 11 mol% Sc2O3 nanopowders that exhibit the t′- and t″-forms of the tetragonal phase, respectively, were synthesized by a stoichiometric nitrate-lysine gel-combustion route. The average crystallite size treated at 900°C was about 25 nm for both compositions. Our results showed that t′-t″ and t″-cubic transitions take place for the 8 and 11 mol% Sc2O3 samples, respectively.

Keywords

nanocrystalline powderszirconia-scandiahigh-temperature X-ray powder diffractionsynchrotron radiation

Information

Type
Technical Articles
Information
Powder Diffraction , Volume 23 , Special Issue S1 , March 2008 , pp. S87 - S90
Copyright
Copyright © Cambridge University Press 2008

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