Cyclic oxidation resistance of rare earth oxide gel coated Fe-Cr alloys
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2006
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 17.
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Resumo
Use of rare earths to increase high temperature oxidation resistance of chromium dioxide
and alumina forming alloys is well known. Rare earth oxide coatings obtained by the solgel technique have been found to be very efficient to apply fine oxide coatings. The cyclic
oxidation resistance (RT-900ºC) of Fe-Cr alloy coated with various rare earth oxide gel
coatings (La2O3, CeO2, Pr2O3, Nd2O3, Sm2O3, Gd2O3, Dy2O3, Y2O3, Er2O3, and
Yb2O3) was determined. Specimens coated with La2O3 and Pr2O3 gels were found to be
the most resistant to cyclic oxidation. In an extension of this study, the effect of cooling
rate, (and consequently thermal shock resistance) from the peak temperature (900ºC,
1000ºC, 1100ºC) to room temperature of specimens coated with La2O3 and Pr2O3 gels
was studied. The morphology and coverage of the rare earth oxide gels varied with the type
of rare earth. The cyclic oxidation resistance increased with increase in time at temperature
required to reach a specific chromium dioxide layer thickness. This in turn was influenced
by rare earth ion radius and other characteristics of the rare earth oxide coating such as
morphology, stability, coverage, resistance to thermal stresses and adhesion.
Como referenciar
FERNANDES, S.M.C.; CORREA, O.V.; RAMANATHAN, L.V. Cyclic oxidation resistance of rare earth oxide gel coated Fe-Cr alloys. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 17., 15-19 de novembro, 2006, Foz do Iguaçu, PR. Resumos... p. 5686. Disponível em: http://repositorio.ipen.br/handle/123456789/20066. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.