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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 55  1996
Fracture Properties of Layered ZrOiZTA Laminates
D. ZHou AND I. M. Low
Pages : 42-45
DOI : 10.1080/0371750X.1996.10804747
Abstract
The nature and effects of residual stresses on the cracking behaviour of indentation cracks in ZTA/Zr02 laminates are studied. The laminates develop alternating residual stresses in the different layers, i.e. compression in one layer (ZT A) and tension in the other (Zr02). However, these biaxial residual stresses behave like the uniaxial ones when observed on the cross-sectional surface using an indentation technique. This paper discusses the influence of residual stresses on the indentation crack-patterns in a ZT A/Zr02 multilayer composite. As expected, compressive stresses tend to suppress crack-initiation and propagation. Strongly bonded interface with the proper control of residual stresses can offer an effective approach for arresting the advance of crack-tip and imparting crack-deflection, without seriously affect the strength of the laminates. An equation for determination of these stresses was established and was wellsupported by experimental data.
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