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The effect of copper oxide on sintering, microstructure, mechanical properties and hydrothermal ageing of coated 2.5Y-TZP ceramics

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Abstract

Copper oxide dopants in amounts up to 1 wt% were added to 2.5 mol% yttria-coated zirconia powders in studies of sintering, microstructure, mechanical properties and hydrothermal ageing behaviour. High densities (>6 Mgm−3), high tetragonal phase content (>95%), and phenomenal fracture toughness values (>17 MPam1/2), were obtained for lower dopant levels. Grain sizes of 0.13 to 0.25 μm were measured for all samples sintered at 1300°C. Rounded pores in some doped samples indicated that a liquid phase was involved during sintering. Copper oxide additions aid low temperature sintering and offer potential for property enhancement with a particularly high toughness being measured as well as improving resistance to structural degradation in 180°C hydrothermal ageing.

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  1. School of Engineering & Advanced Technology, University of Sunderland, Edinburgh Building, Chester Road, Sunderland, SR1 3SD, UK

    S. Ramesh, C. Gill & S. Lawson

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  1. S. Ramesh
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  2. C. Gill
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Ramesh, S., Gill, C. & Lawson, S. The effect of copper oxide on sintering, microstructure, mechanical properties and hydrothermal ageing of coated 2.5Y-TZP ceramics. Journal of Materials Science 34, 5457–5467 (1999). https://doi.org/10.1023/A:1004743924347

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