2368 E.R. Andrievskaya Journal of the European Ceramic Sociery 28(2008)2363-2388 F 200+Fr + m c L 24002400 22022 2000 2000 770+10 Tc(e) 2800 2800 260 L 2600 -2600 430+25 2200 2000 F+C 2000 2000 T+F mol 03 Yb.o mol 2900±30 00+302600 2200 T+F 780±10 F+M 1351020304050607080905 2° Fig. 2. Phase diagrams of the binary systems with hafnia and lanthanide oxides from terbia to lutetia:(a)HfO2-Tb2O3, 2(b)HfO2-Dy203, 122(c)HfO2-Y203, 54 (d)HfO2-Ho2O3, 154(e)HfO2z-Er203, 54(f) HfO2-Yb203, 54(g)HfO2-Lu2O3 1542368 E.R. Andrievskaya / Journal of the European Ceramic Society 28 (2008) 2363–2388 Fig. 2. Phase diagrams of the binary systems with hafnia and lanthanide oxides from terbia to lutetia: (a) HfO2–Tb2O3, 122 (b) HfO2–Dy2O3, 122 (c) HfO2–Y2O3, 154 (d) HfO2–Ho2O3, 154 (e) HfO2–Er2O3, 154 (f) HfO2–Yb2O3, 154 (g) HfO2–Lu2O3. 154