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J. Korean Ceram. Soc. > Volume 31(7); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(7): 772.
이트리아 안정화 지르코니아에서 미세조직 설계에 따른 전기전도도와 파괴인성치의 적정화
강대갑, 김선재
한국원자력연구소
Optimization of Electrical Conductivity and Fracture Toughness in $Y_2O_3-Stabilized$ $ZrO_2$ through Microstructural Designs
ABSTRACT
Using two kinds of ZrO2 powder stabilized by 8 mol% and 3 mol% of Y2O3 several microstructures were designed; two single composition specimens of 8 mol% Y2O3-ZrO3 and 3 mol% Y2O3-ZrO2 and five mixture specimens with multi-layered structure and particulate mixture structure at a mixing ratio of 1:1 by weight. Electrical conductivities were measured from 250 to 75$0^{circ}C$ in air using an impedance analyser, and fracture toughness at room temperature using the indentation method. Making the mixture structures was more effective in enhancing fracture toughness than electrical conductivity. At low temperatures 3 mol% Y2O3-ZrO2 showed the highest values in both electrical conductivity and fracture toughness, while at high temperature the specimens of alternately stacked planar and coarse granulated structure were most favorable.
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