Institute of Physics of Materials AS CR, v. v. i. > Projects > Utilization of theoretical and experimental approaches to sintering for tailoring the microstructure and properties of advanced ceramic materials

Utilization of theoretical and experimental approaches to sintering for tailoring the microstructure and properties of advanced ceramic materials

Co-investigatorRNDr. Jiří Svoboda, CSc., DSc.
Number of Project15-06390S
AgencyGrantová agentura České republiky
Duration2014-12-31 - 2017-12-30

Anotace
Several theoretical concepts of sintering predict that grain size and density of the sintered ceramic materials do not depend on the choice of a heating regime. However, many recent reports demonstrated refined microstructures achieved by modifying the heating regime. Two
approaches are used for the desription of sintering and grain growth of advanced ceramic materials. The experimentally based approach compares various experimental conditions and obtained macroscopic characteristics with sintering models. Theoretically based approach
describes sintering and grain growth process by numerical solution of model equations. In this project we combine both experimental and theoretical approaches to develop a universal sintering model. This original model will also allow tailoring the polycrystalline ceramic
microstructure and functional properties by the proper choice of sintering heating regime. Generally, the project would bridge the gap between sintering theory and experiments with synergic benefits of both approaches.


2017

Svoboda J., Fischer F.: Incorporation of vacancy generation/annihilation into reactive diffusion concept - Prediction of possible Kirkendall porosity. Comp. Mater. Sci. 127 (2017) 136-140

Maca K., Pouchlý V., Drdlík D., Hadraba H., Chlup Z.: Dilatometric study of anisotropic sintering of alumina/zirconialaminates with controlled fracture behaviour. J. Eur. Ceram. Soc. 37 (2017) 4287-4295

Hackl K., Fischer F., Svoboda J.: A variational approach to the modelling of grooving in a three-dimensional setting. Acta Mater. 129 (2017) 331-342

Drdlík D., Drdlíková K., Hadraba H., Maca K.: Optical, mechanical and fractographic response of transparent alumina ceramics on erbium doping. J. Eur. Ceram. Soc. 37 (2017) 4265-4270

Drdlíková K., Klement R., Hadraba H., Drdlík D., Galušek D., Maca K.: Luminescent Eu3+-doped transparent alumina ceramics with high hardness. J. Eur. Ceram. Soc. 37 (2017) 4271-4277



2016

Svoboda J., Fratzl P., Zickler G., Fischer F.: A new treatment of transient grain growth. Acta Mater. 115 (2016) 442-447

Spusta T., Svoboda J., Maca K.: Study of pore closure during pressure-less sintering of advanced oxide ceramics. Acta Mater. 155 (2016) 347-353

Fischer F., Hackl K., Svoboda J.: Improved thermodynamic treatment of vacancy-mediated diffusion and creep. Acta Mater. 108 (2016) 347-354

Svoboda J., Fischer F.: A self-consistent model for thermodynamics of multicomponent. Scr. Mater. 126 (2016) 154-157



2015

Svoboda J., Zickler G., Kozeschnik E., Fischer F.: Kinetics of interstitial segregation in Cottrell atmospheres and grain boundaries. Philos. Mag. Lett. 95 (2015) 458-465