0597780 - ÚFM 2025 RIV GB eng J - Journal Article
Drdlík, D. - Sokolov, I. - Hadraba, Hynek - Chlup, Zdeněk - Drdlíková, K. - Máca, K.
Sintering activation energies of anisotropic layered and particle alumina/ zirconia-based composites and their mechanical response.
Ceramics International. Roč. 50, č. 19 (2024), s. 37430-37440. ISSN 0272-8842. E-ISSN 1873-3956
R&D Projects: GA MŠMT(CZ) EH22_008/0004634
Institutional support: RVO:68081723
Keywords : residual-stresses * ceramic composites * fracture-toughness * practical approach * grain-growth * densification * curve * surface * kinetics * zta * Sintering * Activation energy * High-temperature dilatometry * Laminate * Particle composite
OECD category: Ceramics
Impact factor: 5.1, year: 2023 ; AIS: 0.639, rok: 2023
Method of publishing: Open access
Result website:
https://www.sciencedirect.com/science/article/pii/S0272884224016602?via%3DihubDOI: https://doi.org/10.1016/j.ceramint.2024.04.263

Information on the sintering activation energy is currently focused on evaluation of single-phase ceramic systems. This work shows the results of high-temperature dilatometry measurements of layered and particle composites based on alumina and zirconia. Layered composites with different layer thickness ratios and particle composites with variable composition in the entire concentration range were prepared by electrophoretic deposition allowing manufacturing composites with precious design and strongly bonded interfaces. The phenomena observed during the high-temperature dilatometry measurements are discussed, and the data were used to calculate the sintering activation energies of composites using the modified Master Sintering Curve concept. By covering a wide range of composite designs, it was possible to determine differences in activation energies and to show their dependence on the direction in the case of laminate composites given by the directionally dependent sintering behaviour. Sintering activation energies of layered composites were always higher than for monoliths due to constrained sintering showing maximum sintering activation energies at lower volumes of zirconia in the layers for longitudinal and transversal orientation of the samples. A similar trend was identified in particle composites due to slowed down alumina densification by the pinning effect. Additionally, mechanical properties represented by Vickers hardness and indentation elastic modulus were related to the microstructure developed during sintering. The effects of interconnectivity of phases present in the composites together with other parameters of the microstructure were described.
Permanent Link: https://hdl.handle.net/11104/0355599


Research data: Zenodo