To simulate impedance spectra of yttria-stabilised zirconia/alumina composites a digital-image based model has been developed. The computer simulation generates the polycrystalline microstructure of the material by exploiting the Voronoi tessellation technique. Then a 3-D network of cubes is superimposed onto the simulated polycrystalline microstructure and the edges of each cube substituted with discrete RC parallel electrical circuits. The composite is, in such a way, converted into a three-dimensional electrical network whose impedance has been calculated at different frequency values. The numerical solution has been performed via an iterative method based on a matrix non-linear recursion relation. Results of the simulation are presented and compared with experimental data
Dotelli, G., Volpe, R., Natali Sora, I., Mari, C. (1998). Impedance spectra simulation of Yttria-Stabilized Zirconia/Alumina Composites. SOLID STATE IONICS, 113(Special Issue), 325-331 [10.1016/S0167-2738(98)00297-5].
Impedance spectra simulation of Yttria-Stabilized Zirconia/Alumina Composites
Mari, CM
1998
Abstract
To simulate impedance spectra of yttria-stabilised zirconia/alumina composites a digital-image based model has been developed. The computer simulation generates the polycrystalline microstructure of the material by exploiting the Voronoi tessellation technique. Then a 3-D network of cubes is superimposed onto the simulated polycrystalline microstructure and the edges of each cube substituted with discrete RC parallel electrical circuits. The composite is, in such a way, converted into a three-dimensional electrical network whose impedance has been calculated at different frequency values. The numerical solution has been performed via an iterative method based on a matrix non-linear recursion relation. Results of the simulation are presented and compared with experimental dataI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.