The preparation method of diamond composite film won the national invention patent
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On December 30, it was learned that the patent “Method for Preparing Textured Diamond-Like Composite Film for Water Lubrication†invented by researchers of the State Key Laboratory of Solid Lubrication of Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, obtained the national invention patent authorization (patent No.: ZL200810189022.1). Water lubrication has the characteristics of no pollution, low cost of use and easy maintenance. It is the most promising lubrication medium. However, water has the disadvantages of low viscosity, strong cavitation, poor lubricity, and the problems of corrosion and wear of water-lubricated friction pairs, which greatly limits the scope of its use. Therefore, the search for friction pair materials with good wear resistance and corrosion resistance under water lubrication conditions has become one of the key issues in the development of water lubrication technology. Surface texture is an effective treatment method for developing water-lubricated friction pairs. Friction-side surface film/coating technology is the main method to improve water lubrication performance. Carbon-based solid lubricating film such as diamond-like film exhibits excellent anti-friction resistance in water. Grinding and corrosion resistance have received widespread attention. Combining surface texturing treatment with carbon-based solid lubricating film technology to form a surface multi-scale textured composite film can make up for or even eliminate the limitations of the two types of means, realize the synergistic water lubrication effect of the two optimization technologies, and develop the water environment. Excellent friction material. However, there is still no relevant patent report in the current technology development in this area. The invention adopts laser surface micro-forming technology to obtain a micro-texture shape on the surface of the workpiece, and then plasma-cleans the workpiece by magnetron sputtering deposition technology, and then is doped with a titanium-like diamond film by a titanium transition layer. It is possible to obtain a film on the surface of the workpiece. The method fully utilizes the texture lubrication effect of the textured surface topography and the excellent tribological properties of the hydrogen-free diamond-like carbon film in water, and the prepared textured diamond-like composite film greatly improves the water-lubricating condition of the conventional diamond-like carbon film. Under the stability and anti-friction and anti-wear performance, the friction coefficient is reduced by up to 40%, and the wear resistance is improved by 1 to 3 times. The surface of the film material has micro-pits and grooves, which is very suitable for surface protection and strengthening of mechanical seal rings, thrust bearings and other mechanical transmission friction pairs in water environment, and boundary lubrication and near-dry at low speed and frequent start and stop. Longer service life and reliability under friction conditions.