Effect of CuO additives on the reversibility of zirconia crystalline phase transitions

摘要

We have studied the influence of the differentsatmospheres on the sintering of CuO-Doped-zirconiaceramics. After an annealing treatment in a reductingatmosphere, we have found nanoparticles of metallic copperin triple points and in the grains of the sintered zirconia.Furthermore, the influence of the intergranular Y2Cu2O5phase on the tetragonal to monoclinic phase transition andthe crystalline structure of zirconia is discussed with respectto results obtained from X-ray difraction, differential thermalanalysis, Raman spectroscopy and High ResolutionTransmission Electron Microscopy.