The influence of small additions of MnO2 (up to 1 wt. %) on the sintering behaviour of yttria-stabilized zirconia sintered
over the temperature range from 1250°C to 1500°C was investigated. It was found that the mechanical properties of Y-TZP
were dependent on the dopant amount and sintering temperature. The results revealed that relative densities above 97.5 %
of theoretical (i.e. > 5.95 Mg m-3) could be obtained in Y-TZPs sintered at low temperatures, 1250°C and 1300°C, with the
additions of ≥ 0.3 wt. % MnO2. In comparison to the undoped samples, the additions of up to 1 wt. % MnO2 and for sintering
up to 1350°C was found to be beneficial in enhancing the Vickers hardness of the ceramic. The fracture toughness of Y-TZP
however, was found to increase only in the 1 wt. % MnO2-doped samples when sintered above 1400°C. The relation between
the measured mechanical properties is discussed with the emphasis on the role of the manganese oxide.
المشارك في البحث
سنة البحث
2013
مجلة البحث
Ceramics Silikaty
عدد البحث
Vol.57, No.1
تصنيف البحث
1
صفحات البحث
PP.28-32
ملخص البحث