Positron annihilation study of yttria-stabilized zirconia nanopowders containing Cr2O3 additive

Abstract

Yttria-stabilized zirconia compacted nanopowders, doped with trivalent chromium oxide, were studied by means of high-resolution positron lifetime and coincidence Doppler broadening techniques. The observed data suggest that positrons annihilate mainly in vacancylike defects at grain boundaries or in larger open volumes most likely located at triple points. The results also show that an addition of Cr2O3 leads to a decrease in grain size. © Published under licence by IOP Publishing Ltd.