YZrO2-Ni cermet processing by high energy milling
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2007
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INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 6th
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Resumo
A new method for SOFC fuel cell anode preparation is proposed where the main difference lies
over cermet powder processing by high energy milling. Yttria stabilized zirconia powder and
metallic nickel undergo co-milling in a vibratory device employing zirconia bead media. Dispersed
and homogeneous powders are therefore obtained. The material is pressed uniaxialy and sintered at
1350°C for 0,5 h in air and under argon and hydrogen. In the former case, partial nickel oxidation
occurs before sintering leading to small shrinkage down to 2% and porosity about 38%. Linear
shrinkages from 5 to 7% after sintering in both inert and reduced atmospheres were observed not
demanding pore-former additives. Conventional YSZ, Ni and NiO powder mixtures were prepared
for comparison purpose. The high energy milling process is able to reduce the starting sintering
temperature by 130° C besides a higher densification compared to the simple mixtures YSZ+Ni.
The excessive sintering and particle coalescence is absent in high energy milled material, where the
metal is well dispersed and the microstructure is highly homogenous. The high energy milling
process is a promising route to prepare with excellent performance anode materials for SOFC cells.
Como referenciar
RESTIVO, T.A.G.; CASTANHO, S.R.H.M. YZrO2-Ni cermet processing by high energy milling. In: INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 6th, Nov. 7-10, 2007, Buzios, RJ. Proceedings... p. 884-889. Disponível em: http://repositorio.ipen.br/handle/123456789/18471. Acesso em: 20 Mar 2026.
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.