Paper Title:
Sinterability of Alumina-Dispersed 3Y-TZP
  Abstract

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.

  Info
Periodical
Key Engineering Materials (Volumes 317-318)
Edited by
T. Ohji, T. Sekino and K. Niihara
Pages
37-40
DOI
10.4028/www.scientific.net/KEM.317-318.37
Citation
B. R. Cho, D. G. Yeoum, "Sinterability of Alumina-Dispersed 3Y-TZP", Key Engineering Materials, Vols. 317-318, pp. 37-40, 2006
Online since
August 2006
Export
Price
$32.00
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