Process for coating ceramic discs and ceramic disc obtained by said method.

摘要

A process for coating ceramic discs and ceramic disc obtained by said method.; It comprises the steps of preparing said previously lapped and polished ceramic discs; and depositing a layer of hydrogenated amorphous carbon on said ceramic discs, said deposition phase including the following steps: exposure of said ceramic discs to vacuum; applying a plasma cleaning on said ceramic discs; applying a first plasma deposition on said ceramic discs; and applying a second plasma deposition on said ceramic discs.; The ceramic disc is characterized in that it comprises a layer of hydrogenated amorphous carbon deposited directly onto the ceramic disc.; a ceramic discs are achieved for use in mixing type mixer valves whose friction coefficient is lower than the ceramic discs currently used, all without losing tightness, without having to use grease and with a reduced manufacturing cost.