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Journal of the European Ceramic Society 15 (1995) 1185-I 192
© 1995 Elsevier Science Limited
0955-2219(95)00102-6
Printed in Great Britain. All rights reserved
0955-2219(95)00102-6

Mechanical Property Characterization of a 9 mol% Ce-TZP Ceramic Material - I. Flexural Response
G. A. Gogotsi a , V. P. Zavada a & M. V. Swain b
a Institute for Problems of Strength, Ukranian Academy of Sciences, 252014 Kiev, Ukraine
b Department of Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia

(Received 5 August 1994; revised version received 13 March 1995; accepted 31 May 1995)

Abstract

Investigations were carrted out on four tetragonal zirconia polycrystalline (TZP) ceramics of differing grain size containing 9 mol% CeO 2 . Precision flexural tests on these materials were conducted to determine the elastic modulus, the non-linear deflection and the associated acoustic emission during such testing. The deformation was characterized in terms of the number and size of the transformation bands that developed during the non-linear response. The finest grained material initially exhibited permanent set without the presence of such bands, whereas all the coarser grained materials showed a linear relationship between the summation of the band widths and the residual deflection. The acoustic emission and plastic strain behaviour are discussed in terms of the number and size of the stress induced phase transformation bands.

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