P. V. Korolev, A. V. Knyazev, I. R. Gavrilov, M. R. Gavrilov, A. V. Korolev, “X-ray diffraction and calorimetric studies of powder nanocrystalline systems based on ZrO$_2$(Y) and Al$_2$O$_3$ with second insoluble component”, Fizika Tverdogo Tela, 2012, Volume 54, Issue 2,Pages 252

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Dielectrics

X-ray diffraction and calorimetric studies of powder nanocrystalline systems based on ZrO$_2$(Y) and Al$_2$O$_3$ with second insoluble component

P. V. Korolev^a, A. V. Knyazev^b, I. R. Gavrilov^a, M. R. Gavrilov^a, A. V. Korolev^a

^a Limited Liability Company Scientific Enterprise "High Technology", Cheboksary, Chuvash Republic, 428000, Russia
^b National Research Lobachevsky State University of Nizhny Novgorod

Abstract: Four nanocrystalline ZrO$_2$(Y)- and Al$_2$O$_3$-based powders synthesized by plasma spray pyrolysis have been studied. It has been shown that the ZrO$_2$(3Y)-based system with second component Al$_2$O$_3$ forms a nonequilibrium solid solution ZrO$_2$(3Y, Al) with the tetragonal structure. It has been found that the existence of an component (ZrO$_2$(Y)) insoluble in the coarse-grained state in Al$_2$O$_3$-based systems causes the delay of the $\gamma$ $\to$ $\alpha$ transformation and decreases the size of the coherently scattering domains of formed nanosized modifications of Al$_2$O$_3$.

Received: 28.06.2011