Effect of residual stresses to the crack path in alumina/zirconia laminates

0531649 - ÚFM 2021 RIV GB eng J - Journal Article
Chlup, Zdeněk - Novotná, L. - Šiška, Filip - Drdlík, D. - Hadraba, Hynek
Effect of residual stresses to the crack path in alumina/zirconia laminates.
Journal of the European Ceramic Society. Roč. 40, č. 15 (2020), s. 5810-5818. ISSN 0955-2219. E-ISSN 1873-619X
R&D Projects: GA ČR(CZ) GA17-08153S; GA MŠMT(CZ) LQ1601
Institutional support: RVO:68081723
Keywords : Laminates * Alumina * Zirconia * Residual/internal stresses * Crack path
OECD category: Ceramics
Impact factor: 5.302, year: 2020
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0955221920305148?via%3Dihub

Laminates with alternating layers are well known from nature. The strongly bonded alumina/zirconia (Al2O3/
ZrO2) layers can combine high fracture resistance with high strength and stiffness when properly tailored. The
presence of compressive residual stresses formed in Al2O3 layers can suppress and deflect cracks propagating
through the layers. The crack path is governed by both the elastic properties and the internal stress field of
individual layers. The laminates with various layer-thickness ratios ranging from 0.1 to 3 were used to investigate
the effect of residual stresses and influence of crack formation pattern on the crack path development.
The indentation surface cracks observed in various alumina-zirconia laminates exhibit the same crack deflection
independently on the level of internal stresses. The crack deflection observed on the fracture surfaces of bending
specimens was related to the indentations cracks. The complicated crack path was explained experimentally by
3D reconstruction with the support of numerical simulations.
Permanent Link: http://hdl.handle.net/11104/0311101