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PVD (Physical Vapor Deposition) and CVD (Chemical Vapor Deposition) are two major thin-film coating technologies. PVD vaporizes materials through physical means (e.g., heating or sputtering), resulting in strong adhesion but slower deposition rates. CVD forms coatings via chemical reactions, off
As a new polishing process, plasma polishing is a trend in stainless steel polishing. If we can make good use of plasma polishing will save us a lot of time and costs.
PVD and CVD are the most commonly used surface treatment methods for tools and moulds, CVD is based on chemical vapour deposition and PVD is based on physical vapour deposition, as they differ in principle, the final coating results are different and each has its own focus in application.
Electrolytic polishing has great advantages over traditional polishing, low cost, small footprint, can polish complex workpieces, has unmatched advantages over traditional polishing.
PVD stands for Physical Vapour Deposition. PVD coating refers to a thin film deposition technique whereby solid materials are sputtered or evaporated in a vacuum environment and deposited as pure materials or alloy components to form a coating on a substrate.
Views: 41 Author: Site Editor Publish Time: 2022-05-18 Origin: Site
PVD is a technique for preparing thin films by physically depositing material onto the workpiece to be coated under vacuum conditions.
PVD (physical vapour deposition) coating technology is mainly divided into three categories, vacuum evaporation coating, vacuum sputtering coating and vacuum ion coating. Corresponding to the three classifications of PVD technology, the corresponding vacuum coating equipment also has vacuum evaporation coating machine, vacuum sputtering coating machine and vacuum ion coating machine. In the last decade or so, the development of vacuum ion coating technology is the fastest and it has become one of the most advanced surface treatment methods today. When we say PVD coating, we are referring to vacuum ion coating; when we say PVD coating machine, we are referring to vacuum ion coating machine.
The specific principle of PVD (ion coating) technology is to use low voltage, high current arc discharge technology under vacuum conditions, using gas discharge to evaporate the target material and make the evaporated material and gas ionisation, using the acceleration effect of the electric field, so that the evaporated material and its reaction products are deposited on the workpiece. The film layer produced by PVD coating technology has high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability, etc. The life of the film layer is longer; at the same time, the film layer can significantly improve the appearance of the workpiece decorative performance.
The application of PVD coating technology is divided into two main categories: decorative coating and tool coating. The purpose of decorative coating is to improve the appearance and colour of the workpiece, and to make the workpiece more wear-resistant and corrosion-resistant to extend its service life. The purpose of tool plating is to improve the surface hardness and wear resistance of the workpiece, reduce the friction coefficient of the surface and improve the service life of the workpiece; this is mainly used in various knives and scissors, turning tools (such as turning tools, planing tools, milling tools, drills, etc.), various hardware tools (such as screwdrivers, pliers, etc.), various moulds and other products.
The PVD coating technology is an environmentally friendly surface treatment method that can truly obtain micron-level layers without pollution. It can produce various single metal films (such as aluminium, titanium, zirconium, chromium, etc.), nitride films (TiN, ZrN, CrN, TiAlN) and carbide films (TiC, TiCN), as well as oxide films (such as TiO, etc.). The thickness of PVD coating layer is micron level, generally 0.3μm~5μm, among which the thickness of decorative coating layer is generally 0.3μm~1μm, so it can improve various physical and chemical properties of the surface of the workpiece with almost no effect on the original size of the workpiece, and no further processing is required after plating. Golden yellow, coffee, bronze, grey, black, grey-black and heptachrome. The colour can be controlled by controlling the relevant parameters during the coating process; the colour can be quantified by measuring the colour with relevant instruments after coating to determine whether the colour meets the requirements.
The similarities between PVD coating and traditional chemical plating are that both belong to the category of surface treatment and both cover the surface of one material with another material in a certain way. The differences between the two are: PVD coating has a greater bond with the surface of the workpiece, the hardness of the coating is higher, the wear resistance and corrosion resistance is better, and the performance of the coating is more stable; PVD coating does not produce toxic or polluting substances.
