The thickness of PVD (Physical Vapor Deposition) coatings typically ranges from 0.25 to 5 microns. This range is extremely thin, considering that the diameter of a human hair is about 70 microns, making a 5-micron coating nearly invisible to the naked eye. Despite their thinness, PVD coatings significantly enhance the properties of materials, such as smoothness, hardness, corrosion resistance, and load-bearing capacity, without altering their appearance.
The choice of thickness in PVD coatings depends on the specific application. For decorative purposes, coatings can be as thin as 0.2 to 0.5 microns, which can withstand many years of mild to moderate wear. In contrast, for functional applications that require greater durability under harsh conditions, the thickness can range from 1 to 5 microns. In these cases, the substrate material must also be harder to support the thin coating, preventing it from reaching the fracture point under localized pressure.
PVD coatings are applied using specialized equipment that operates in a vacuum, which can be expensive and requires a high level of expertise. The process allows for a wide range of colors and finishes, such as brass, rose gold, gold, nickel, blue, black, and more, by altering the deposition parameters. This versatility makes PVD coatings a popular choice for various industries, from decorative to industrial applications.
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