Effect of Composition on the Structure and Properties of MgO/Y2O3 Composite Ceramics
Д. А. Пермин, Alexander Belyaev, Stanislav Balabanov, В. А. Кошкин, М. С. Болдин, A. V. Novikova, О. В. Тимофеев, Zh. K. Gashpar, И. В. Ладенков
Abstract
We have studied the effect of the ratio of the macrocomponents of magnesium oxide- and yttrium oxide-based composite ceramics on their microstructure and optical and mechanical properties over the entire composition range. The ceramics were produced under identical conditions by hot-pressing nanopowders prepared by self-propagating high-temperature synthesis. The composition of the ceramics has been shown to have a significant effect on their optical transmission, average grain size, and density, whereas their microhardness is essentially independent of composition. Composite ceramics with a magnesium oxide to yttrium oxide volume ratio of 50 : 50 are optimal for most practical applications.