Densification behavior of Spark Plasma Sintered La2O3–YSZ ceramic composites

The present paper describes the fabrication and densification behavior of 8mol% Yttria-stabilized Zirconia (YSZ)-based composites with the addition of 11.6, 21.6 and 30.5wt% La2O3 fabricated by the Spark Plasma Sintering (SPS) process. Addition of La2O3 to YSZ had a significant grain refining effect...

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Bibliographic Details
Published in:	Ceramics international 2014-01, Vol.40 (1), p.715-722
Main Authors:	Robles Arellano, K.D., Bichler, L., Akkiraju, K., Fong, R., Mondal, K.
Format:	Article
Language:	eng
Subjects:	A. Sintering B. Composite B. Grain size Ceramics D. ZrO2 Densification Grain refinement Pyrochlores Sintering Solid solutions Spark plasma sintering Yttria stabilized zirconia
Online Access:	Get full text
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Summary:	The present paper describes the fabrication and densification behavior of 8mol% Yttria-stabilized Zirconia (YSZ)-based composites with the addition of 11.6, 21.6 and 30.5wt% La2O3 fabricated by the Spark Plasma Sintering (SPS) process. Addition of La2O3 to YSZ had a significant grain refining effect on the YSZ ceramic. In all of the studied composites, the desirable cubic structure of the YSZ matrix was retained and 94–96% densification was achieved. The matrix of the sintered composites evolved a solid solution due to interdiffusion of La, Zr and Y, as well as formation of pyrochlore lanthanate La1.6Y0.4Zr2O7 phase formed as the reaction product between YSZ and La2O3 during sintering.
ISSN:	0272-8842 1873-3956