Phase stabilisation, thermal expansion and ionic conductivity of high content rare earth oxide (Lu2O3, Y2O3 and Gd2O3) stabilised cubic hafnia
SÉVIN, Louise
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
AUDOUARD, Lisa
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
See more >
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
SÉVIN, Louise
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
AUDOUARD, Lisa
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
< Reduce
DMAS, ONERA, Université Paris Saclay [Châtillon]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Centre National d'Études Spatiales [Toulouse] [CNES]
Language
en
Article de revue
This item was published in
Journal of the European Ceramic Society. 2023, vol. 43, n° 9, p. 4153-4166
Elsevier
English Abstract
For satellite propulsion, new material are developed to sustain harsh thermal and environmental conditions in the combustion chambers induced by the development of new “green” propellants less toxic than currently used ...Read more >
For satellite propulsion, new material are developed to sustain harsh thermal and environmental conditions in the combustion chambers induced by the development of new “green” propellants less toxic than currently used hydrazine. In the present study, hafnia-based materials with different amounts and natures of stabilisers (Lu2O3, Y2O3 and Gd2O3) have been chosen for the ceramic part of the system. Microstructures, Thermal Expansion Coefficients (373–1673 K) and ionic conductivities (600–1273 K) of synthesised fully stabilised fluorite phases have been investigated. Lattice parameters have been determined and an abacus has been proposed as a function of the amount of RE2O3 and the ionic radius of the Rare Earth cation (RE3+). Moreover, it has been observed a TECs decrease from 14 to 40 mol% of RE2O3 and few changes in the ionic conductivity above 33 mol% of RE2O3. Finally, addition of Lu2O3 allows to reach the lowest TEC and ionic conductivity.Read less <
English Keywords
Fluorite
Ionic conductivity
Thermal Expansion Coefficient (TEC)
Environmental Barrier Coating (EBC)
HfO2
Rare Earth Oxide
Origin
Hal imported