K. Ranjbar et al., EFFECT OF CHEMICALLY ADDED ZIRCONIA AND YTTRIA ON THE MECHANICAL-PROPERTIES OF ZIRCONIA-DISPERSED ALUMINA, American Ceramic Society bulletin, 73(2), 1994, pp. 63-66
Alumina powders dispersed with monoclinic, tetragonal, and cubic zirco
nia were prepared by evaporating a colloidal dispersion. of alumina po
wders in. solutions containing zirconium and yttrium salts. The dried
and calcined powders were compacted, sintered, and characterized. The
results demonstrated a clear toughening effect by the zirconia on the
alumina ceramics. The alumina containing 20-omega t%-yttria-stabilized
tetragonal zirconia had the maximum toughness.