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The principle of PVD vacuum coating technology
PVD is the abbreviation of Physical Vapor Deposition in English, which means "physical vapor deposition" in Chinese. It refers to a thin film preparation technology that uses a physical method to deposit materials on the workpiece to be plated under vacuum conditions.
2. PVD coating
PVD (Physical Vapor Deposition) coating technology is mainly divided into three categories: vacuum evaporation coating, vacuum sputtering and vacuum ion coating. In the past ten years, the development of vacuum ion plating technology is the fastest, and it has become one of the most advanced surface treatment methods today. What we usually call PVD coating refers to vacuum ion coating; the commonly referred to PVD coating machine refers to vacuum ion coating machine.
3, the principle of PVD coating technology
The specific principle of PVD coating (ion coating) technology is to use low-voltage, high-current arc discharge technology under vacuum conditions to evaporate the target material and ionize the vaporized substance and gas, and use the acceleration of the electric field. Function to deposit the evaporated substance and its reaction products on the workpiece.
4, the characteristics of PVD coating film
The film layer plated by PVD coating technology has the characteristics of high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability, and the life of the film is longer; at the same time, the film can be greatly improved Improve the appearance and decoration performance of the workpiece.
5, the types of coatings that can be plated by PVD coating
PVD coating technology is an environmentally friendly surface treatment method that can truly obtain micron-level coatings without pollution. It can prepare various single metal films (such as aluminum, titanium, zirconium, chromium, etc.), nitride films (TiN, ZrN, CrN, TiAlN) and carbide films (TiC, TiCN), and oxide films (such as TiO, etc.).
6, the thickness of the PVD coating film layer
The thickness of the PVD coating film is micron level, and the thickness is relatively thin, generally 0.3μm ~ 5μm, and the thickness of the decorative coating film is generally 0.3μm ~ 1μm, so the surface of the workpiece can be improved without affecting the original size of the workpiece. The various physical and chemical properties of the metal, do not need to be processed after plating.
7, the color type of the film that can be plated by the PVD coating
PVD coatings can currently be made of golden yellow, champagne, dark brown, bronze, brown, bronze, gray, black, seven colors and so on. By controlling the relevant parameters in the coating process, the plated color can be controlled; after the coating is completed, the color can be measured with related instruments to quantify the color to determine whether the plated color meets the requirements.
8. The similarities and differences between PVD coating and traditional chemical electroplating (water electroplating)
The similarity between PVD coating and traditional chemical plating is that both belong to the category of surface treatment, and both cover the surface of one material on the other material in a certain way. The difference between the two is: PVD coating has greater bonding force with the surface of the workpiece, the hardness of the coating is higher, the wear resistance and corrosion resistance are better, and the performance of the coating is more stable; PVD coating will not produce Toxic or polluting substances.
9, PVD coating technology is currently mainly applied in industries
The application of PVD coating technology is mainly divided into two categories: decorative coating and tool coating. The purpose of decorative plating is mainly to improve the appearance and decoration performance and color of the workpiece while making the workpiece more wear-resistant and corrosion-resistant to extend its service life; this aspect is mainly used in various fields of the hardware industry, such as door and window hardware, locks, bathroom hardware and other industries. Now most of the building decoration, door industry enterprises, elevator car panels, high-end hotels, entertainment venues, sports and venues are also widely used. 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 increase the service life of the workpiece; this aspect is mainly used in various cutting tools, turning tools (such as turning tools, planers, milling cutters) , Drill bits, etc.), various hardware tools (such as screwdrivers, pliers, etc.), various molds and other products.
10. The main features and advantages of PVD coating (ion coating) technology. Compared with vacuum evaporation coating and vacuum sputtering coating, PVD ion coating has the following advantages:
1>. The film layer and the surface of the workpiece have a strong bonding force, which is more durable and wear-resistant
2 >. The diffraction performance of ions is good, and the workpiece with complex shape can be plated
3>. Fast film deposition rate and high production efficiency
4>. Wide variety of coatable layers
5>. The film has stable performance and high safety (obtained FDA certification and can be implanted in the human body)
Features of PVD products:
Anti-corrosion and oxidation: Under normal conditions, it will not fade, lose luster, crack and peel off;
Bright colors: golden yellow, titanium black, pearl black, sapphire blue, Chinese red, emerald green, bronze, dark brown, coffee, rose gold and other colors are available;
Excellent plasticity: no chipping, cracking or flattening under stamping, bending, punching, trimming, or other processing;
Anti-wear: The hardness exceeds 80RC, it will not wear under normal use;
Lasting: The surface of PVD products can remain unchanged for 20 years, and PVD processed products will have a longer service life;
Economical: Compared with gold-plated or copper-plated products, the time and cost of cleaning and maintaining PVD products will be less: because only a piece of cloth and a bottle of window cleaner are needed;
Anti-vandalism: the marks painted with markers or lacquer can be washed away;
Environmental protection: No toxic chemicals are used in the production process, and there is no noise.
Article tags： The principle of PVD vacuum coating technology
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