Abstract: Monolithic ceramic bodies that have a mixed-oxide marginal region and a metallic surface, where the ceramic body includes an oxide of a first metal (I), while the mixed-oxide marginal region includes the oxide of the first metal (I) and the oxide of a further metal (II) having a high affinity for oxygen, and the metallic surface includes the further metal (II). The mixed oxide marginal region includes a continuous concentration gradient of the first metal (I), from 100% in the core to 0% in the transitional region to the metallic surface of the ceramic body, and a continuous concentration gradient of the further metal (II), starting from 0% in the core to 100% in the transitional region to the metallic surface of the ceramic body, where the oxygen concentration in the mixed-oxide marginal region remains constant, and the monolithic structure of the ceramic body has no phase boundaries.

Abstract: The invention relates to a sintered component (1), in particular an annular sintered component (1), with a toothing (2), wherein the toothing (2) comprises teeth (3) with tooth bases (6) and tooth flanks (4). All of the teeth (3) and tooth bases (6) of the toothing (2) comprise a plasma nitrided or plasma nitrocarburized layer (7), wherein the tooth bases (6) have a tooth base fatigue strength ?F lim according to DIN 3990 of at least 200 MPa.

Abstract: Monolithic ceramic bodies that have a mixed-oxide marginal region and a metallic surface, where the ceramic body includes an oxide of a first metal (I), while the mixed-oxide marginal region includes the oxide of the first metal (I) and the oxide of a further metal (II) having a high affinity for oxygen, and the metallic surface includes the further metal (II). The mixed oxide marginal region includes a continuous concentration gradient of the first metal (I), from 100% in the core to 0% in the transitional region to the metallic surface of the ceramic body, and a continuous concentration gradient of the further metal (II), starting from 0% in the core to 100% in the transitional region to the metallic surface of the ceramic body, where the oxygen concentration in the mixed-oxide marginal region remains constant, and the monolithic structure of the ceramic body has no phase boundaries.

Abstract: The invention describes a process for the production of a coating (6) on the basis of at least one material selected from a group comprising silicon, germanium, and the oxides SiOx or GeOx of these elements, whereby these are doped where applicable and produced specifically amorphised, on at least a subsection of a surface (3) of a metallic substrate (2), whereby the concentration of nitrate is increased in the substrate (2) where applicable prior to precipitation of the coating (6) at least in the area of the subsection. This subsection is subjected to oxidation prior to precipitation of the coating (6).