Correlations among sintering temperature, shrinkage, and open porosity of 3.5 YSZ/Al2O3 composites

Slip-cast ceramic samples of the system (100−x) (ZrO2–3.5mol% Y2O3)–xAl2O3 (abridged as (100−x) 3.5 YSZ/xAl2O3 composite, where x is expressed in wt%) were examined using dilatometry, isothermal sintering and electron microscopy methods. The shrinkage in the range 1100–1300°C was found to be higher...

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Bibliographic Details
Published in:Ceramics international 2016-05, Vol.42 (7), p.8005-8009
Main Authors: Zhuravlev, V.D., Komolikov, Yu.I., Ermakova, L.V.
Format: Article
Language:English
Subjects:
Al2O3
Composites
Porosity
Sintering
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Summary:Slip-cast ceramic samples of the system (100−x) (ZrO2–3.5mol% Y2O3)–xAl2O3 (abridged as (100−x) 3.5 YSZ/xAl2O3 composite, where x is expressed in wt%) were examined using dilatometry, isothermal sintering and electron microscopy methods. The shrinkage in the range 1100–1300°C was found to be higher for the (100−x) 3.5 YSZ/xAl2O3 samples with prevailing fraction of PSZ than for the composites with a corundum matrix. When the weight fraction of corundum was increased, the relative shrinkage of the (100−x) 3.5 YSZ/xAl2O3 samples decreased and the open porosity of the ceramic materials grew. The effect of -Al2O3 impurity on the sintering process and linear dimensions of ceramics is shown. Heat treatment of (50–40) 3.5 YSZ/(50–60) Al2O3 composites at 1300°C are proposed as the optimum conditions for porous diaphragm formation.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2016.01.204