A tribological system, comprising a main body and a sandwich lubrication, in which the sandwich lubrication includes a binder-free solid lubricant layer comprising a solid lubricant, and a lubricant layer comprising a lubricant. The binder-free solid lubricant layer and the lubricant layer are present as separate layers on the main body and wherein the mass ratio of solid lubricant to lubricant is at most 0.05:1

The present invention relates to coated sliding parts having coating systems which allow better sliding performance under dry and/or under lubricated conditions. The coating systems according to the present invention being characterized by having an outermost layer which—is a smooth oxide-containing layer in case of sliding applications under lubricated conditions, or—is a self-lubricated layer comprising molybdenum nitride, in case of sliding applications under dry or lubricated conditions, is a self lubricated layer with a structured surface comprising a multitude of essentially circular recesses with diameters of several micrometers or below, the recesses randomly distributed over the surface.

The present invention relates to coated sliding parts having coating systems which allow better sliding performance under dry and/or under lubricated conditions. The coating systems according to the present invention being characterized by having an outermost layer which—is a smooth oxide-containing layer in case of sliding applications under lubricated conditions, or—is a self-lubricated layer comprising molybdenum nitride, in case of sliding applications under dry or lubricated conditions, is a self lubricated layer with a structured surface comprising a multitude of essentially circular recesses with diameters of several micrometers or below, the recesses randomly distributed over the surface.

To provide a trivalent chromium plating film, in which the generation of cracks penetrating from the film surface to a substrate interface is suppressed, and a sliding member coated with the trivalent chromium plating film, plating is conducted with a chromium plating bath containing trivalent chromium as a chromium source, with a second phase dispersed in a planar and/or fibrous form, such that the second phase in a planar and/or fibrous form is dispersed in the hard chromium plating film to prevent or deflect the propagation of cracks, and to suppress the increase of the crack width, thereby suppressing the propagation of cracks in the hard chromium plating film.

To provide a trivalent chromium plating film, in which the generation of cracks penetrating from the film surface to a substrate interface is suppressed, and a sliding member coated with the trivalent chromium plating film, plating is conducted with a chromium plating bath containing trivalent chromium as a chromium source, with a second phase dispersed in a planar and/or fibrous form, such that the second phase in a planar and/or fibrous form is dispersed in the hard chromium plating film to prevent or deflect the propagation of cracks, and to suppress the increase of the crack width, thereby suppressing the propagation of cracks in the hard chromium plating film.

A bearing element for at least one adjustable guide vane of a turbomachine, in particular an aircraft engine, is provided. The bearing element comprising a porous matrix made of carbon and/or graphite and at least one metallic phase or a metal salt that is at least partially arranged inside the pores of the matrix, so that what results is a metal-infiltrated or a metal-salt-infiltrated material.

A bearing element for at least one adjustable guide vane of a turbomachine, in particular an aircraft engine, is provided. The bearing element comprising a porous matrix made of carbon and/or graphite and at least one metallic phase or a metal salt that is at least partially arranged inside the pores of the matrix, so that what results is a metal-infiltrated or a metal-salt-infiltrated material.

The invention relates to a component having a coating containing chromium, nitrogen and carbon. According to the invention the coating comprises a sliding layer having a ceramic phase and a carbon phase, the ceramic phase forms a crystalline ceramic phase from Crx(C.sub.1-yN.sub.y) with 0.8=x=1.2 and y>0.7, and the crystalline ceramic phase and the carbon phase form a layer system of alternating individual layers (A, B), wherein the carbon phase has interstices that are filled with the crystalline ceramic phase.

The invention relates to a component having a coating containing chromium, nitrogen and carbon. According to the invention the coating comprises a sliding layer having a ceramic phase and a carbon phase, the ceramic phase forms a crystalline ceramic phase from Crx(C.sub.1-yN.sub.y) with 0.8=x=1.2 and y>0.7, and the crystalline ceramic phase and the carbon phase form a layer system of alternating individual layers (A, B), wherein the carbon phase has interstices that are filled with the crystalline ceramic phase.

An aqueous coating agent composition includes (A) a curable resin in the form of an aqueous emulsion, (B) a surfactant, (C) solid particles, (D) one or more nitrogen-containing heterocyclic compounds, and (E) water. In various embodiments, component (C) includes a solid lubricant, and for reasons of environmental regulations, component (D) includes 1,3-dimethyl-2-imidazolidinone.