E.R. Andrievskaya Journal of the European Ceramic Sociery 28(2008)2363-2388 T, c(a) 2800 2600 2600 220 1800 00 Tb,O, 2800 H州 M+F 80H0O zr0.2040 T, cI(h) 2800 2400 4. Phase diagrams of the binary systems with hafnia and lanthanide oxides from terbia to lutetia: (a)ZrO2-Tb203, 6(b and c)ZrOx-Dy2O3, 63, 194(d)ZOz-Y20 6(e)ZrOx-Ho2O3, 63(f and g)ZrO2-Er203, 219, 221(h)ZrO2-Yb2O3632370 E.R. Andrievskaya / Journal of the European Ceramic Society 28 (2008) 2363–2388 Fig. 4. Phase diagrams of the binary systems with hafnia and lanthanide oxides from terbia to lutetia: (a) ZrO2–Tb2O3, 63 (b and c) ZrO2–Dy2O3, 63,194 (d) ZrO2–Y2O3, 156 (e) ZrO2–Ho2O3, 63 (f and g) ZrO2–Er2O3, 219,221 (h) ZrO2–Yb2O3. 63