Strengthening of ZrO2 Ceramics due to Nano-Crystallization

Abstract:

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The fracture strength σf of ZrO2-based ceramics tends to increase with decreasing grain size d. As compared with the data for submicrometer-grain-sized material with d ≈ 350 nm, nano-crystallization of ZrO2 ceramics less than d ≈ 90 nm can improve σf by a factor of 2.0-2.5. The maximum strength reaches σf ≈ 2500 MPa, which is classed as the highest σf of oxide ceramic materials. The high σf can be associated with an increase in the critical t →m transformation stress and a decrease in the flaw size due to nano-crystallization.

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Periodical:

Edited by:

P. VINCENZINI

Pages:

1674-1679

DOI:

10.4028/www.scientific.net/AST.45.1674

Citation:

K. Morita et al., "Strengthening of ZrO2 Ceramics due to Nano-Crystallization ", Advances in Science and Technology, Vol. 45, pp. 1674-1679, 2006

Online since:

October 2006

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$35.00

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