Composite wear component produced by casting and consisting of a metal matrix whose working face or faces includes inserts which have a very high wear resistance, characterized in that the inserts consist of a ceramic pad, this ceramic pad consisting of a homogeneous solid solution of 20 to 80% of Al.sub.2O.sub.3 and 80 to 20% of ZrO.sub.2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.