Abstract
The leaching behavior of Y2O3-Al2O3-SiO2 glasses was studied in connection with the hydrothermal corrosion of Si3N4-Y2O3/Al2O3 ceramics. Leaching tests were conducted with the glass blocks under hydrothermal conditions at 300°C for 1 to 10 days. It was found that the weight loss of the glasses is less than 0.8mg/cm2 after 10 days and the durability of the glasses is higher than that of SiO2 glass, Corning-1723 glass and Si3N4-Y2O3/Al2O3 ceramics. It was considered that the higher durability of the glass under hydrothermal conditions is due to the lower leach rates of Y2O3 and Al2O3.
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