Thin films deposited on vacuum silvered surfaces

Thin films deposited on vacuum silvered surfaces

Developed countries such as Germany, Japan, the United States, the United Kingdom and other countries attach great importance to the development and application of engineering ceramic materials, and compete to invest a lot of money and manpower to develop the processing theory and technology of engineering ceramics. Germany has launched a program called "SFB442", which aims to use PVD technology to synthesize appropriate films on the surface of parts to replace lubricating media that are potentially harmful to the environment and human body. Germany's P.W.Gold and others used the funds of the SFB442 program to deposit films on the surface of rolling bearings by applying PVD technology. They found that the anti-wear properties of rolling bearings were significantly improved, and the films deposited on the surface could completely replace the function of extreme pressure and anti-wear additives. Joachim, Franz et al. of Germany used PVD technology to prepare WC/C films and showed excellent fatigue resistance, which was higher than that of lubricating oils containing EP additives. This result also drew the possibility of replacing harmful additives with coatings. E. Lugscheider et al., from the School of Materials Science of Aachen University of Technology, Germany, with the support of DFG (German Research Commission), demonstrated that the fatigue strength was significantly improved after depositing a suitable film on 100Cr6 steel using PVD technology. In addition, General Motors Corporation of the United States has begun to deposit films on the gear surface of its Volvo S80Turbo to improve the resistance to fatigue pitting corrosion; the famous Timken Company has launched a gear surface film named ES200; the gear coating with the registered trademark MAXIT has been Appeared in Germany; gear coatings with registered trademarks Graphit-iC and Dymon-iC also appeared in the UK.

Vacuum silver-plated gear coating material

Engineering ceramic materials are very promising materials for development and application. Engineering ceramic materials have high strength and hardness, especially excellent heat resistance, low thermal conductivity and thermal expansion, and high wear resistance and oxidation resistance. A large number of studies have shown that the ceramic material itself has the characteristics of heat resistance and small metal wear. Therefore, the use of ceramic materials instead of metal materials as wear-resistant parts can improve the life of the friction pair, and can meet some demanding requirements for materials such as high temperature, high wear resistance, and multi-function. At present, engineering ceramic materials have been used in the manufacture of engine heat-resistant parts, wear-resistant parts in mechanical transmission, corrosion-resistant parts and seals in chemical equipment, and increasingly show a wide range of application prospects for ceramic materials.

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