Sinterability of Alumina-Dispersed 3Y-TZP


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The effect of Al2O3 addition on sinterability of Tetragonal Zirconia Polycrystal powders including 3mol% Y2O3 (3Y-TZP) was investigated. Each 3Y-TZP powder dispersed with 0.3, 0.6, 0.9 and 1.2wt.% of Al2O3 was prepared by the spray-drying method. The prepared powders were pressed into a disk type and sintered at 1350, 1400, 1450 and 1500 for 2 hours in the air. Resultant microstructures and mechanical properties of specimens were investigated by using Vickers/Micro hardness Tester, FE-SEM and XRD. Most of the specimens showed high relative density over 99% and a higher fracture toughness than pure 3Y-TZP. Al2O3 particles dispersed in 3Y-TZP microstructure depressed grain growth of 3Y-TZP by the pinning effect. Increase in fracture toughness of 3Y-TZP was explained by the crack deflection due to dispersed Al2O3 particles.



Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara




B. R. Cho and D. G. Yeoum, "Sinterability of Alumina-Dispersed 3Y-TZP", Key Engineering Materials, Vols. 317-318, pp. 37-40, 2006

Online since:

August 2006




[1] M. Rule and A.G. Evans: High toughness ceramics and ceramics composites(Progress in Materials Science 1989).

[2] T.K. Gupta, F.F. Lange and T.H. Bechtold: J. Mater. Sci. Vol. 13 (1978), p.1464.

[3] K. Tsukuma and M. Shimada: J. Mater. Sci. Vol. 20 (1985), p.1178.

[4] Lawson: J. Eur. Ceram. Soc. Vol. 15 (1995), p.485.

[5] T. Sato and M. Shimada: J. Am. Ceram. Soc. Vol. 68 (1985), p.356.

[6] S.J. Glass and D.J. Green: J. Am. Ceram. Soc. Vol. 79 (1996), p.2227.

[7] J.F. Li and R. Watanabe: J. Am. Ceram. Soc. Vol. 78 (1995), p.1079.

[8] C. Greskovich and J. A. Palm: J. Am. Ceram. Soc. 63 (1980), p.597.