Abstract
The effect of modifying strontium cations on the phase composition of the sol–gel synthesized matrix systems containing 20% of Al2O3 and 80% of a tetragonal zirconia polycrystals (TZP) solid solution stabilized by cerium [Ce-TZP] and ytterbium [Yb-TZP] cations is studied. The microstructure of the composites with a [Yb-TZP] matrix has a more fine-grained composition (200–500 nm) than the microstructure of the [Ce-TZP] matrix composites, whose grain sizes range within 800–1500 nm. Independently of the matrix solid solution type, modification promotes the formation of composites with a three-grain microstructure including long prismatic SrAl12O19 grains, which may perform dispersion strengthening in the composites.
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