Correlations among sintering temperature, shrinkage, and open porosity of 3.5 YSZ/Al2O3 composites. Issue 7 (15th May 2016)

• Record Type: Journal Article
• Authors: Zhuravlev, V.D.; Komolikov, Yu.I.; Ermakova, L.V.
• Is Part Of: Ceramics international. Volume 42:Issue 7(2016)
• Page Start: 8005
• Page End: 8009
• Publication Date: 2016-05-15
• Subjects: Sintering -- Composites -- Porosity -- Al2O3; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.01.204
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Slip-cast ceramic samples of the system (100 −x ) (ZrO2 –3.5 mol% Y2 O3 )– x Al2 O3 (abridged as (100− x ) 3.5 YSZ/ x Al2 O3 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/ x Al2 O3 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/ x Al2 O3 samples decreased and the open porosity of the ceramic materials grew. The effect of -Al2 O3 impurity on the sintering process and linear dimensions of ceramics is shown. Heat treatment of (50–40) 3.5 YSZ/(50–60) Al2 O3 composites at 1300 °C are proposed as the optimum conditions for porous diaphragm formation.