Abstract: The disclosure relates to sintered ceramic grains comprising 3-55 wt. % alumina, 40-95 wt. % zirconia and 1-30 wt. % of one or more other inorganic components. The invention further relates to a method for preparing ceramic grains according to the invention, comprising: making a slurry comprising alumina, zirconia; making droplets of the slurry; introducing the droplets in a liquid gelling-reaction medium wherein the droplets are gellified; drying the gellified deformed droplets.

Abstract: The disclosure herein relates to a method for preparing ceramic grains comprising: making a slurry comprising inorganic particles and a gelling agent; making droplets of the slurry; introducing the droplets in a liquid gelling-reaction medium wherein the droplets are gellified; deforming the droplets before, during or after gellification; drying the gellified deformed droplets, thereby obtaining dried grains and sintering the dried grains, thereby obtaining the ceramic grains. The disclosure herein further relates to ceramic grains obtainable by a disclosed method.

Abstract: The disclosure relates to sintered ceramic grains comprising 3-55 wt. % alumina, 40-95 wt. % zirconia and 1-30 wt. % of one or more other inorganic components. The invention further relates to a method for preparing ceramic grains according to the invention, comprising: making a slurry comprising alumina, zirconia; making droplets of the slurry; introducing the droplets in a liquid gelling-reaction medium wherein the droplets are gellified; drying the gellified deformed droplets.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces include 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 Al2O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces include 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 Al2O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.

Abstract: Composite wear component produced by casting and consisting of a metal matrix whose working face or faces include 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 A12O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.

Abstract: 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 Al2O3 and 80 to 20% of ZrO2, the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.