DLC (Diamond-Like Carbon) coating is known for its scratch resistance properties. It is a metastable form of amorphous carbon that contains a significant amount of sp3 bonds. DLC coatings are often deposited using the radio frequency plasma-assisted chemical vapor deposition (RF PECVD) method. This allows for the deposition of carbon films with a wide range of optical and electrical properties.
DLC coatings have a high hardness, reaching up to 9000 HV on the Vickers scale, which is second only to natural diamond (10,000 HV). This hardness makes DLC coatings highly scratch-resistant. They are even more scratch-resistant than other coating materials like PVD (Physical Vapor Deposition) coatings.
The scratch resistance of DLC coatings is due to their high hardness and chemical resistance. They provide a protective layer that can enhance the scratch resistance of the underlying substrate. Therefore, DLC coatings are commonly used on watches to enhance their functional properties while maintaining a luxurious look.
In addition to scratch resistance, DLC coatings also offer other advantages. They have low coefficients of friction (COF), which means they can reduce wear and friction in tribological systems. This makes them ideal for applications in engines, machines, and other mechanical assemblies with sliding and rolling movements.
DLC coatings are chemically inert and biocompatible, which allows for their application on medical components and implants. They can also be applied to a broad range of substrate materials without causing distortion. Furthermore, DLC coatings do not require post-treatment, making them a convenient and efficient coating solution.
Overall, DLC coatings provide excellent scratch resistance, hardness, wear resistance, low friction properties, and chemical inertness. These properties make DLC coatings highly desirable for a wide range of applications, including watches, tribological systems, medical components, and decorative purposes.
