Toughening of yttria-stabilised tetragonal zirconia ceramics

Author: Basu, B.

Source: International Materials Reviews, Volume 50, Number 4, August 2005 , pp. 239-256(18)

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Abstract:

Current knowledge of toughening mechanisms in zirconia ceramics is reviewed, with particular emphasis on the transformation toughening of yttria-stabilised polycrystalline tetragonal zirconia (Y-TZP). The physics and mechanics of transformation toughening are discussed, but the main aim is to provide a comprehensive understanding of the role of the metastable tetragonal zirconia phase on stress induced transformation toughening. The focus is on the microstructural variables governing the stability of tetragonal zirconia in the context of transformation toughening. The potential for additional toughening contributions from microcracking and ferroelastic toughening is briefly addressed and the coupling of toughening mechanisms is also discussed. Finally, a perspective on the future development of Y-TZP-based high toughness materials is given.

Keywords: TOUGHNESS; TRANSFORMATION TOUGHENING; MICROCRACKING; ZRO2; TZP; MICROSTRUCTURE

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174328005X41113

Publication date: 2005-08-01

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The archive of International Materials Reviews has three previous titles. The full archive is available online, and each title has a separate page of volumes. Please see Metallurgical Reviews , for volumes 1-16, International Metallurgical Reviews for volumes 17-20 and International Metals Reviews for volumes 21-31
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