Nanostructured scandia stabilized zirconia consolidated by high-pressure spark plasma sintering
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2018
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BRAZILIAN MRS MEETING, 17th
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Resumo
Scandia-stabilized zirconia, ScSZ, is an oxide-ion conductor with high ionic
conductivity at relatively low temperatures (about 500 ºC). The consolidation of
this ionic conductor requires high temperatures to achieve high densification, due
to its low sinterability. Moreover, ScSZ exhibits a complex phase diagram for
compounds up to 10 mol% scandia, including an ordered rhombohedral phase
with low ionic conductivity. In this work, fully dense ScSZ specimens were
obtained by high-pressure spark plasma sintering using deformable punches (DPSPS).
Nanocrystalline powders containing 6, 8 and 10 mol% scandia were
synthesized by simultaneous precipitation followed by heat treatment at 500ºC for
2 h. The mean grain sizes of specimens consolidated by DP-SPS at 700 and 800ºC
and at 1.5 and 2 GPa, varied from 8 to 17 nm. The grain size dependent cubic
phase stabilization was evidenced by Raman spectroscopy. High degree of
translucence was obtained in dense specimens of ScSZ obtained by the DP-SPS
method.
Como referenciar
MUCCILLO, ELIANA N. dos S.; GROSSO, ROBSON L.; MUCHE, DERECK N.; CASTRO, RICARDO H. Nanostructured scandia stabilized zirconia consolidated by high-pressure spark plasma sintering. In: BRAZILIAN MRS MEETING, 17th, September 16-20, 2018, Natal, RN. Abstract... São Carlos: Aptor Software, 2018. p. 54-54. Disponível em: http://repositorio.ipen.br/handle/123456789/30334. Acesso em: 26 Mar 2026.
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