Role of nanostructured modifiers in composite corundum ceramics preparation
https://doi.org/10.29235/1561-8331-2019-55-4-400-414
Abstract
Influence of highly disperse nanostructured modifiers of alumina – magnesia, partially stabilized zirconia – on the consolidation processes of composite ceramics of industrial corundum powders annealed at 1600–1700 °C, changes of its microstructure and physico-mechanical properties is investigated. It is established, that due to processes of self-diffusion of active modifiers there is a distribution of their nanograins on the borders of miсroparticles of corundum powder. In addition, nanostructured modifiers fill a pore space that causes sliding of particles under mechanical and thermal loads of material and transfers the mechanism of fragile destruction to pseudo-plastic. The entered nanostructured modifiers promote the process of lamellar zones formation throughout the material that also strengthens its mechanical properties. The correlation of composite ceramics structure and their physico-mechanical characteristics are developed.
About the Authors
T. M. Ulyanova
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Tatyana M. Ulyanova – Ph. D. (Chemistry), Leading Researcher
9/1, Surganov Str., 220072
N. P. Кrutko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Nikolay P. Krutko – Academician, D. Sc. (Chemistry), Professor, Director General of the State Research and Production Association “Chemical Products and Technologies»
9/1, Surganov Str., 220072
P. A. Vityaz
Presidium of the National Academy of Sciences of Belarus
Belarus
Belarus
Petr A. Vityaz – Academician, D. Sc. (Engineering), Head of Establishment of the National Academy of Sciences of Belarus
99, Nezavisimosti Ave., 220023, Minsk
A. A. Shevchenok
Belarusian State Agrarian Technical University
Belarus
Belarus
Aleksandr A. Shevchenok – Ph. D. (Engineering), Assistant Professor
Aleksandr A. Shevchenok – Ph. D. (Engineering), Assistant Professor
L. V. Оvseenko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Ludmila V. Ovseenko – Ph. D. (Chemistry), Deputy Director for Science and Innovation
9/1, Surganov Str., 220072
L. V. Тitova
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Ludmila V. Titova – Researcher
9/1, Surganov Str., 220072
E. A. Кashaed
State Research and Production Powder Metallurgy Association
Belarus
Belarus
Evgenij A. Kashaed – Researcher. Powder Metallurgy Institute
41, Platonov Str., 220071, Minsk
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