Abstract
Yttria-tetragonal zirconia polycrystals (Y-TZP) with a range of yttria contents were prepared from powders neutralized during processing with ammonium hydroxide and sintered at temperatures of 1300–1700 °C. Iron or copper oxide was ádded and studies made of body characteristics, mechanical properties and ageing resistance. Densification was aided by higher yttria concentrations. The effects of the oxide additives were dependent on amounts present and sintering conditions, including ramp rates and holding temperatures. Ageing resistance was significantly improved for both oxide additions fired to lower temperatures but rapid transformation to monoclinic phase was observed for materials with larger grain sizes associated with higher sintering temperatures.
Similar content being viewed by others
References
N. Kimura, S. Abe, Y. Hayashi, J. Morishita andH. Okamura,Sprechsaal 122 (1989) 341.
N. Kimura, S. Abe, J. Morishita andH. Okamura, in “Sintering ' 87”, edited by S. Somiya, M. Shimada, M. Yoshimura and R. Watanabe (Elsevier Applied Science, London, 1988) p. 1142.
S. Lawson, PhD thesis, University of Sunderland, UK (1993).
M. Yoshimura,Am. Ceram. Soc. Bull. 67 (1988) 1950.
S. Lawson andP.A. Smith,J. Am. Ceram. Soc. 76 (1993) 3170.
K. Tsukuma, Y. Kubota andT. Tsukidatr, in “Advances in Ceramics”, Vol.12, “Science and Technology of Zirconia II”, edited by N. Claussen, M. Ruble and A.H. Heuer (American Ceramic Society, Columbus, OH, 1984) p. 382.
T. Sato andM. Shimada,J. Am. Ceram. Soc. 68 (1985) 356.
M. Yoshimura, T. Noma, K. Kawabata andS. Somiya,J. Mater. Sci. Lett. 6 (1987) 465.
F. F. Lange, G. P. Dunlop andB. I. Davies,J. Am. Ceram. Soc. 69 (1986) 237.
S. Schmauder andH. Schubert,ibid. 69 (1986) 534.
G.P. Dransfield, K. A. Fothergill andT. A. Egerton, in “Euro-Ceramics”, Vol. 1, edited by G. de With, R.A. Terpstra and R. Metselaar (Elsevier Applied Science, London, 1989) p. 275.
A.D. Savill, PhD thesis, Nottingham University (1974).
S. Lawson, G. P. Dransfield, P. McColgan, A. G. Jones andM. W. Rainforth, Presented at the 8th CIM-TEC-World Ceramic Congress, Florence, Italy, June–July 1994.
C.-M. Hwang andI.-W. Chen,J. Am. Ceram. Soc. 73 (1990) 1626.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lawson, S., Gill, C. & Dransfield, G.P. The effects of copper and iron oxide additions on the sintering and properties of Y-TZP. J Mater Sci 30, 3057–3060 (1995). https://doi.org/10.1007/BF01209217
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01209217