Abstract
High quality powders of tetragonal zirconia of the composition Nd0.01 Ce0.08 Zr0.91 O2-x have been prepared hydrothermally by in-situ crystallization (best 225°C/2.4 MPa, 7–8 h, pH 10–11) of co-precipitated sulphate derived gels. The best powders contain 0.2 wt% residual SO3. Uniaxially pressed tablets of the as prepared freeze dried powders sinter to >95% TD in 1 hat 1350°C, whereas tablets of calcined and milled powders sinter to >99% TD in 1 h at 1320°C. These ceramics have an average grain size around 1 µm, a 4-point bending strength of 450 MPa, and show a pseudo-plastic behaviour. The toughness is too high to be measured by Vickers indentation. Sintering to 1400°C for 2 h results in sufficient grain growth to induce a slow spontaneous transformation of tetragonal→monoclinic zirconia upon cooling.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Damtoft, J.S., Engen, J. & Frederiksen, J., Stabilized Zirconia Powder Derived from Sulphate Solutions. In New Materials and Processes: Proceedings of the 5th Scandinavian Symposium on Materials Science, eds. I.L.H. Hansson & H. Lilholt, 1989, pp.221–228.
Damtoft, J.S., Engen, J., Frederiksen, J., Garcia-Coronado, N., Gilbart, E., Grahl-Madsen, L. & Brook, R.J. (in prep), Alternative Stabilizers for Zirconia Ceramics: Powders Derived by Processing of Eudialyte. Extended Synthesis Report, EURAM contract no. MA1E/0019/C.
Smith, A. & Baumard, J.-F., Sinterability of Tetragonal ZrO2 Powders. Am. Ceram. Soc. Bull., 1987, 66, 1144–1148.
Grahl-Madsen, L., Engen, J. & Riman, R., Hydrothermal Preparation of Stabilized Zirconia Powder. In Ceramic Powder Science III, eds. G.L. Messing, S.-I. Hirano & H. Hausner, Am. Ceram. Soc., 1990, pp.33–40.
Denkewicz, R.P., TenHuisen, K.S. & Adair, J.H., Hydrothermal Crystallization Kinetics of m-ZrO2 and t-ZrO2. J. Mater. Res., 1990, 5, 2698–2705.
Li, C., Yamai, I., Musrase, Y. & Kato, E., Formation of Aciculat Monoclinic Zirconia Particles under Hydrothermal Conditions. J. Am. Ceram. Soc., 1989, 72, 1479–1482.
Klug, H.P. & Alexander, L.E.: X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials, John Wiley & Sons, 2.ed. 1974, pp.1–966.
Toraya, H., Yoshimura, M. & Somiya, S., Calibration Curve for Quantitative Analysis of the Monoclinic-Tetragonal ZrO2 System by X-ray Diffraction. J. Am. Ceram. Soc., 1984, C119–C121.
Mendelson, M.I, Average Grain Size in Polycrystalline Ceramics. J. Am. Ceram. Soc., 1969, 52, 443–46.
Anstis, G.R., Chantikul, P., Lawn, B.R. & Marshall, D.B., A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct Crack Measurements. J. Am. Ceram. Soc., 1981, 64, 533–543.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Elsevier Science Publishers Ltd and MPA Stuttgart
About this chapter
Cite this chapter
Grahl-Madsen, L., Petersen, N., Warner, K., Damtoft, J.S., Engell, J. (1992). Nd-Ce-TZP Powders and Ceramics: Hydrothermal Preparation of High Quality Powders from Sulphate Precursors. In: Carlsson, R., Johansson, T., Kahlman, L. (eds) 4th International Symposium on Ceramic Materials and Components for Engines. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2882-7_19
Download citation
DOI: https://doi.org/10.1007/978-94-011-2882-7_19
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-85166-776-5
Online ISBN: 978-94-011-2882-7
eBook Packages: Springer Book Archive