A method for forming an abrasive surface includes applying an electric current through a plating solution so as to cause an abrasive grit to be deposited onto a workpiece and varying a waveform of the electric current while building up a matrix material at least partially around the abrasive grit.

The present disclosure relates to coatings. For example, some embodiments may include methods for producing a coating comprising: depositing a metallic matrix on a substrate by electrochemical deposition using a deposition bath including carbon comprising particles and oxide particles dispersed therein; wherein the carbon comprising particles are embedded into the metallic matrix and pores are distributed in the coating; wherein at least 80% of the pores have a pore diameter in a range from 3 to 30 m; wherein oxide particles are incorporated into and fixed in the pores during deposition and the oxide particles remain partially uncoated by the material of the metallic matrix.

Coated surfaces and coatings are described. The coated surfaces can include a surface coating comprising an alloy layer. The alloy layer can include molybdenum or tungsten in combination with one or more of nickel, cobalt, chromium, tin, phosphorous, iron, magnesium or boron Processes for producing the surface coatings are also described.

Devices with a moveable component that includes a coated surface are described. In some examples, the moveable component can contact a functional fluid during movement of the moveable component. The moveable component includes a coated surface with a surface coating comprising an alloy layer. The alloy layer comprises molybdenum or tungsten in combination with one or more other materials.

A method of synthesizing metal nanoparticles is provided. The method includes submerging an electrically conductive substrate in a polysaccharide solution containing a predetermined concentration of a metal salt; applying an electric potential between the electrically conductive substrate and the polysaccharide solution for a predetermined period of time to form a polysaccharide layer containing metal nanoparticles on the electrically conductive substrate; re-dissolving the polysaccharide layer in a solvent to form a solution including the polysaccharide and the metal nanoparticles; and separating the metal nanoparticles from the polysaccharide.

A method of synthesizing metal nanoparticles is provided. The method includes submerging an electrically conductive substrate in a polysaccharide solution containing a predetermined concentration of a metal salt; applying an electric potential between the electrically conductive substrate and the polysaccharide solution for a predetermined period of time to form a polysaccharide layer containing metal nanoparticles on the electrically conductive substrate; re-dissolving the polysaccharide layer in a solvent to form a solution including the polysaccharide and the metal nanoparticles; and separating the metal nanoparticles from the polysaccharide.

A method for making contact wires for sliprings comprising the steps of: coating and/or plating a wire with a first metal of the group of nickel, chrome or a combination thereof; coating and/or plating the wire with a second metal of the group of gold, silver, or a combination thereof; delivering laser radiation and generating an interference pattern of the laser radiation to the surface of the wire; heating the surface selectively as defined by the interference pattern, modifying of the crystal structure and/or providing protrusions and/or recesses due to melting and/or evaporation of the surface material.

The present invention provides an article, at least part of it being coated by inorganic fullerene-like (IF) nanoparticles or composite containing such nanoparticles. Preferably, the invention provides an article made of metal, for use in dentistry or medicine e.g. archwire, needle or catheter, having a friction-reducing film, and methods for coating such articles with a friction-reducing film.

The present invention provides an article, at least part of it being coated by inorganic fullerene-like (IF) nanoparticles or composite containing such nanoparticles. Preferably, the invention provides an article made of metal, for use in dentistry or medicine e.g. archwire, needle or catheter, having a friction-reducing film, and methods for coating such articles with a friction-reducing film.

A method for forming a fuel cell catalyst includes a step of forming an ionomer-containing layer including carbon particles and an ionomer. Tungsten-nickel alloy particles are formed on the carbon particles. At least a portion of the nickel in the tungsten-nickel alloy particles is replaced with palladium to form palladium-coated particles. The palladium-coated particles include a palladium shell covering the tungsten-nickel alloy particles. The palladium-coated particles are coated with platinum to form an electrode layer including core shell catalysts distributed therein.