On the determination of the stress-free temperature for alumina-zirconia multilayer structures
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In: Ceramics International : CI, Vol. 40.2014, No. 4, 2014, p. 5787-5893.
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TY - JOUR
T1 - On the determination of the stress-free temperature for alumina-zirconia multilayer structures
AU - Chlup, Zdeněk
AU - Hadraba, Hynek
AU - Drdlik, Daniel
AU - Maca, Karel
AU - Dlouhy, Ivo
AU - Bermejo, Raul
PY - 2014
Y1 - 2014
N2 - 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. Tref≈1470 °C) was found, which should be considered for the estimation of internal (residual) stresses in alumina/zirconia-based layered ceramics.
AB - 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. Tref≈1470 °C) was found, which should be considered for the estimation of internal (residual) stresses in alumina/zirconia-based layered ceramics.
U2 - 10.1016/j.ceramint.2013.11.018
DO - 10.1016/j.ceramint.2013.11.018
M3 - Article
VL - 40.2014
SP - 5787
EP - 5893
JO - Ceramics International : CI
JF - Ceramics International : CI
SN - 0272-8842
IS - 4
ER -