Synchrotron X-ray powder diffraction study of the tetragonal-cubic phase transition in nanostructured ZrO2-Sc2O3 solid solutions

P.M. ABDALA; D.G. LAMAS; M.E. FERNÁNDEZ DE RAPP; N.E. WALSÖE DE RECA; A.F. CRAIEVICH; M.C.A. FANTINI

POWDER DIFFRACTION

American Institute of Physics-International Centre for Diffraction Data

Año: 2008 vol. 23 p. 87 - 90

0885-7156

The transition between tetragonal and cubic phases in nanostructured ZrO2-Sc2O3 solid solutions by high-temperature X-ray powder diffraction using synchrotron radiation is presented. ZrO2-8 and 11 mol% Sc2O3 nanopowders that exhibit the t´- and t"-forms of the tetragonal phase, respectively, were synthesized by a stoichiometric nitrate-lysine gel-combustion route. The average crystallite size treated at 900°C was about 25 nm for both compositions. Our results showed that t´-t" and t"-cubic transitions take place for the 8 and 11 mol% Sc2O3 samples, respectively.