The invention relates to a method for manufacturing a composite component of a timepiece or of a jewelry part, the composite component comprising a porous ceramic part and a metallic material filling the pores of said ceramic part, said method comprising the steps of: providing a porous ceramic preform of the component, providing a metallic material, heating the metallic material to a temperature higher than the melting point of the metallic material, filling the pores of the ceramic preform with the molten metallic material, cooling the metallic material and the ceramic preform to obtain a solidified metallic material in the pores of the ceramic preform, and applying finishing treatments to obtain the composite component, wherein said porous ceramic preform consists essentially of a material selected from the group consisting of Si.sub.3N.sub.4, SiO.sub.2 and mixtures thereof, and said metallic material is selected from the group consisting of gold, platinum, palladium metals and alloys of these metals. The invention relates also to a composite component of a timepiece or of a jewelry part comprising a porous ceramic part and a metallic material filling the pores of said ceramic part, wherein said porous ceramic part consists essentially of a material selected from the group consisting of Si.sub.3N.sub.4, SO.sub.2 and mixtures thereof, and said metallic material which is selected from the group consisting of gold, platinum, palladium metals and alloys of these metals.

A method for forming a contact piece for a circuit breaker, the contact piece comprising a reinforcement phase and a conductive phase, the method comprising: providing a slurry of the reinforcement phase in liquid; freeze casting the slurry, to form a cast comprising a frozen liquid structure and a reinforcement phase structure; removing the frozen liquid structure from the cast, to form a foam comprising the reinforcement phase structure; sintering the foam, to form a sintered foam; and infiltrating the sintered foam with the conductive phase, to form a piece part.

A method for forming a contact piece for a circuit breaker, the contact piece comprising a reinforcement phase and a conductive phase, the method comprising: providing a slurry of the reinforcement phase in liquid; freeze casting the slurry, to form a cast comprising a frozen liquid structure and a reinforcement phase structure; removing the frozen liquid structure from the cast, to form a foam comprising the reinforcement phase structure; sintering the foam, to form a sintered foam; and infiltrating the sintered foam with the conductive phase, to form a piece part.

A composite material combininga precious metal or an alloy containing a precious metaland a boron-based ceramic having a melting point greater than that of said precious metal and a density at most equal to 4 g/cm3.

A composite material combininga precious metal or an alloy containing a precious metaland a boron-based ceramic having a melting point greater than that of said precious metal and a density at most equal to 4 g/cm3.

Metal-coated zirconia articles have at least one surface that is a surface-treated surface. The surface-treated surface is a phosphate-treated surface. At least a portion of the surface-treated surface is covered with a layer of metal. The metal covering adheres more strongly to the surface-treated surface than to an identical surface that is not surface-treated.

Metal-coated zirconia articles have at least one surface that is a surface-treated surface. The surface-treated surface is a phosphate-treated surface. At least a portion of the surface-treated surface is covered with a layer of metal. The metal covering adheres more strongly to the surface-treated surface than to an identical surface that is not surface-treated.

The invention relates to a mixture containing a gold thiolate, a rhodium(III) compound, and a solvent that contains at least one OH group, in which the mixture has a ratio V=(a)/(b)2.2; (a) is the fraction of solvent and (b) is the gold fraction of the gold thiolate, each relative to the total weight of the mixture.

The invention relates to a mixture containing a gold thiolate, a rhodium(III) compound, and a solvent that contains at least one OH group, in which the mixture has a ratio V=(a)/(b)2.2; (a) is the fraction of solvent and (b) is the gold fraction of the gold thiolate, each relative to the total weight of the mixture.

A concrete having a smooth surface, which is wholly or partly coated with a polymer film obtained by polymerisation under the action of radiation, where the film is itself wholly or partly coated with a thin photovoltaic film.