In the 1950s, with the appearance of oxide ceramics (Al203, ZrO2, BeO, MgO), ceramic materials started to arouse researchers’ interest. In 1975 Garvie and et al. originated a new family of ceramics based on the addition of zirconium oxide. In this work the mechanical properties and the penetration of a ballistic impact zirconia and alumina were studied from the tiles obtained by the sinterization of alumina and zirconia partially stabilized with Y2O3 (Y-PSZ). Several compositions were processed, always predominating, in volume, a matrix of alumina. Beside impact experiences, mechanical properties were also evaluated. The outcomes were analysed, comparing them against alumina formulae without the addition of zirconia.