@article{Chen:2016:10.1016/j.jeurceramsoc.2016.10.002, author = {Chen, Z and Wang, X and Brandon, N and Atkinson, A}, doi = {10.1016/j.jeurceramsoc.2016.10.002}, journal = {Journal of the European Ceramic Society}, pages = {1031--1038}, title = {Analysis of spherical indentation of porous ceramic films}, url = {http://dx.doi.org/10.1016/j.jeurceramsoc.2016.10.002}, volume = {37}, year = {2016} }
TY - JOUR AB - Spherical indentation of a porous brittle La0.6Sr0.4Co0.2Fe0.8O3 ceramic film (porosity=39.7%) on a stiffer elastic Ce0.9Gd0.1O1.95 substrate is simulated by finite element modelling incorporating the Gurson model to account for densification. The simulated load-displacement curves, apparent elastic modulus E, indentation hardness H and densification profile are all in good agreement with experimental data for the film. The simulations show that E and H are not sensitive to film residual stress. However E is very sensitive to the indent depth-film thickness ratio f, although H is less so for f<0.3. The simulated dependence of E and H on f are highly consistent with experimental data, supporting the extrapolation of E and H measured for 0.1<f<0.3, to zero depth for good estimates of the film-alone properties. The inclusion of densification in the simulation makes only a small difference to E, but has a large influence on H as a function of indentation depth. AU - Chen,Z AU - Wang,X AU - Brandon,N AU - Atkinson,A DO - 10.1016/j.jeurceramsoc.2016.10.002 EP - 1038 PY - 2016/// SN - 1873-619X SP - 1031 TI - Analysis of spherical indentation of porous ceramic films T2 - Journal of the European Ceramic Society UR - http://dx.doi.org/10.1016/j.jeurceramsoc.2016.10.002 UR - http://hdl.handle.net/10044/1/41369 VL - 37 ER -
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