Abstract
Data are presented on the compaction behavior of nanocrystalline yttria partially stabilized zirconia powder and the effects of compaction pressure, sintering temperature, and sintering time on the microstructure of the resultant ceramics. It is shown that even relatively low (≃50 MPa) compaction pressures lead to the disintegration of powder particles and aggregates. The compaction behavior of the powder points to changes in the densification mechanism: from quasi-liquid sliding of powder particles at the beginning of the process to the breakdown of large microstructural constituents at the end. In the initial stages of sintering, a robust skeleton forms, which plays a key role in determining the pore structure of the ceramic.
Similar content being viewed by others
REFERENCES
Gusev, A.I. and Rempel', A.A., Nanokristallicheskie materialy (Nanocrystalline Materials), Moscow: Fiz-matlit, 2001.
Korolev, P.V. and Kul'kov, S.N., Microstructure and Phase Composition of Ultrafine Plasma-Processed ZrO2 (Y) Powder, Perspekt.Mater., 1998, no. 1, pp. 6--72.
Marshall, D.B. and James, M.P., J.Am.Ceram.Soc., 1986, vol. 69, no. 3, pp. 215–217.
Saltykov, S.A., Stereometricheskaya metallografiya (Stereometric Metallography), Moscow: Metallurgiya, 1970.
Gupta, T.K., Lange, F.F., and Bechtold, J.N., Effect of Stress-Induced Phase Transformation on the Properties of Polycrystalline Zirconia Containing Metastable Tet-ragonal Phase, J.Mater.Sci., 1978, vol. 13, no. 5, pp. 1464–1470.
Becher, P.F., Toughening Behaviour in Ceramics Associ-ated with the Deformation of Tetragonal Zirconia, Acta Metall., 1986, vol. 34, no. 10, pp. 1885–1891.
Kabanova, M.I., Dubok, V.A., Nochevkin, S.A., et al., Microstructure and Porosity of Zirconia Powder Com-pacts Prepared at Pressures up to 6 GPa, Poroshk.Metall. (Kiev), 1991, no. 9, pp. 69–74.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nikitin, D.S., Zhukov, V.A., Perkov, V.V. et al. Preparation of Porous Ceramics from Nanocrystalline Zirconia and Their Microstructure. Inorganic Materials 40, 760–763 (2004). https://doi.org/10.1023/B:INMA.0000034778.00156.a0
Issue Date:
DOI: https://doi.org/10.1023/B:INMA.0000034778.00156.a0