YZrO2-Ni cermet processing by high energy milling
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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, THOMAZ A.G.; MELLO CASTANHO, SONIA R.H. YZrO2-Ni cermet processing by high energy milling. Materials Science Forum, v. 587-588, p. 514-520, 2008. DOI: 10.4028/www.scientific.net/MSF.591-593.514. Disponível em: http://repositorio.ipen.br/handle/123456789/4907. 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.