10 questions on the PVD basic problem of Baorui PVD equipment
1. What is PVD coating technology?
A: PVD is the abbreviation of English Physical Vapor Deposition. Chinese means “physical vapor deposition”. It refers to the film preparation technology that physically deposits materials on the workpiece to be plated under vacuum conditions.
2. What are the classifications for PVD technology? What PVD coating machine is there?
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A: PVD (Physical Vapor Deposition) technology is mainly divided into three categories, vacuum evaporation coating, vacuum sputtering coating and vacuum ion plating. Compared with the three classifications of PVD technology, the corresponding vacuum coating equipment also has a vacuum evaporation coating machine, a vacuum sputtering coating machine and a vacuum ion coating machine. The development of vacuum ion plating technology has been the fastest in the past decade, and it has become one of the most advanced surface treatment methods in the modern era.
3: What is the specific principle of PVD coating?
Answer: Physical vapor deposition is a physical vapor phase reaction growth method. Under the condition of vacuum or low gas gas discharge, the source of the coating material is a solid substance. After "evaporation or sputtering", it forms a base on the surface of the part. A new solid material coating with completely different material properties.
4: What are the advantages of PVD coating compared to traditional chemical plating (water plating)?
Answer: PVD coatings are similar to traditional electroless plating. Both are surface treatments. They cover the surface of another material in a certain way.
The difference between the two is that the PVD coating layer has a stronger bonding force with the surface of the workpiece, the hardness of the film layer is higher, the wear resistance and corrosion resistance are better, and the performance of the film layer is more stable; the PVD coating can be plated. The type of film is more extensive, and the color of various layers that can be plated is more beautiful and beautiful; PVD coating does not produce toxic or polluting substances.
5: Can PVD coating replace chemical plating?
A: At this stage, PVD coating is not a substitute for chemical plating, and in addition to PVD coating on the surface of stainless steel, before PVD coating on many other materials (such as zinc alloy, copper, iron, etc.) They all need to be electroplated with Cr (chromium) first. PVD coatings are mainly used in some high-end hardware products. For those products with lower prices, they are usually only electroplated without PVD coating.
6: What are the characteristics of the film layer coated by PVD coating technology?
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Answer: The coating layer coated by PVD coating technology has 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 layer can Greatly improve the appearance of the workpiece.
7: What kind of substrate can PVD be plated on?
Answer: PVD film can be directly plated on stainless steel, hard alloy, titanium alloy, ceramics, etc. For zinc alloy, copper, iron and other die-casting parts, it should be firstly electroplated with chromium before being suitable for PVD plating.
8: What kinds of layers can PVD coatings be coated with?
Answer: PVD coating technology is an environmentally friendly surface treatment method that can truly obtain micro-scale coating and is non-polluting. It can prepare various single metal films (such as aluminum, titanium, zirconium, chromium, etc.) and nitride films (TiN[ Titanium], ZrN [zirconium], CrN, TiAlN) and carbide films (TiC, TiCN), and oxide films (such as TiO, etc.).
9: What is the thickness of the PVD coating?
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Answer: The thickness of PVD coating is micron-sized and thinner, generally 0.1μm~5μm. The thickness of decorative coating film is generally 0.1μm~2μm, so it can be improved without affecting the original size of the workpiece. The physical and chemical properties of the surface of the workpiece, and can maintain the size of the workpiece is basically unchanged, no need to re-process after plating.
10: What are the colors of the film that can be plated by PVD coating?
A: The color of the film we can currently make is deep golden yellow, light golden yellow, brown, bronze, gray, black, gray black, seven colors, blue, purple and so on. The color of the plating can be controlled by controlling the relevant parameters in the coating process; after the coating is finished, the color value can be measured with the relevant instrument to quantify the color to determine whether the color is satisfactory.