PHASE-RELATIONS IN THE SYSTEMS ZRO2-Y2O3-ND2O3 AND ZRO2-Y2O3-CEO2

The phase relations of ZrO//2-Y//2O//3-Nd//2O//3 and ZrO//2-Y//2O//3-CeO//2 systems have been studied at 1100-1600 degree C. The single region of the fluorite phase was intensively examined using the relation between lattice parameter and composition. In the ZrO//2-Y//2O//3-Nd//2O//3 system, 37 mol% Nd//2O//3 is soluble in Y//2O//3-stabilized zirconia (fluorite phase) at 1100 degree C and 42 mol% Nd//2O//3 at 1600 degree C. In the ZrO//2-Y//2O//3-CeO//2 system, 40 mol% CeO//2 dissolves into the stabilized zirconia at 1600 degree C.