0434891 - ÚFM 2015 RIV GB eng J - Journal Article
Chlup, Zdeněk - Hadraba, Hynek - Drdlík, D. - Maca, K. - Dlouhý, Ivo - Bermejo, R.
On the determination of the stress-free temperature for alumina–zirconia multilayer structures.
Ceramics International. Roč. 40, č. 4 (2014), s. 5787-5793. ISSN 0272-8842. E-ISSN 1873-3956
R&D Projects: GA ČR(CZ) GAP108/11/1644; GA MŠMT(CZ) ED1.1.00/02.0068
Institutional support: RVO:68081723
Keywords : Sintering * Thermal expansion * Zirconia * Alumina * Layered Ceramics
Subject RIV: JL - Materials Fatigue, Friction Mechanics
Impact factor: 2.605, year: 2014

Internal residual stresses can enhance the fracture resistance and mechanical reliability of layered ceramics. The magnitude of the stresses depends on the elastic and thermal properties of the layers and the typically assumed reference (stress-free) temperature, below which internal stresses develop. A novel combined experimental and numerical simulation approach has been developed to determine the reference temperature and experimentally proved in alumina–zirconia ceramic laminates. Dilatometric data of monolithic phases are input for the numerical simulation and experimental data on the laminate properties are used for the stress-free temperature determination. In contrast to typical assumptions, reference temperature very near the sintering temperature (i.e. approx. T ref
Permanent Link: http://hdl.handle.net/11104/0238865