Effect of Internal Stresses on Fracture Behaviour of Alumina and Zirconia Based Layered Composites

0370079 - ÚFM 2012 RIV SK eng A - Abstract
Chlup, Zdeněk - Hadraba, Hynek - Slabáková, L. - Drdlík, D. - Dlouhý, Ivo
Effect of Internal Stresses on Fracture Behaviour of Alumina and Zirconia Based Layered Composites.
Engineering Ceramics 2011 Book of Abstracts. Bratislava: VEDA, 2011 - (Pavol Šajgalík, Zoltán Lenčéš). s. 71. ISBN 978-80-970657-4-4.
[Advanced Research Workshop Engineering Ceramics 2011 from Materials to Components. 08.05.2011-12.05.2011, Smolenice Castle]
R&D Projects: GA ČR GD106/09/H035
Institutional research plan: CEZ:AV0Z20410507
Keywords : Ceramics * laminates * crack propagation * internal stresses * fracture behaviour
Subject RIV: JL - Materials Fatigue, Friction Mechanics

Laminates with strong bond between layers were examined in this work to explore influence of internal stresses on the fracture behaviour. A set of laminates having different level of internal stresses were prepared. Alumina and zirconia were the model materials for alternating layers. The electrophoretic deposition technique was used for manufacturing of the laminates. The basic mechanical properties as elastic modulus and flexural strength were determined. The crack propagation changes due to internal stresses, elastic mismatch, surface effects etc. were investigated using various method. The indentation cracking and modified single edge notched beam technique was employed. An extensive fractographic analysis of fracture surfaces was undertaken. The dependence between crack direction in the alternating layers and level of internal stresses were described in detail. Conclusions taking in to account surface effects were pronounced.
Permanent Link: http://hdl.handle.net/11104/0203985