In modern surface treatment technology, DLC (Diamond-Like Carbon) and PVD (Physical Vapor Deposition) are two important coating technologies. This article will explore their differences and the specific applications of DLC coatings in the watch industry.
1. Differences Between DLC and PVD Coatings
- Material Composition:
- DLC Coating: Composed of a carbon film that resembles the structure of natural diamond, giving it unique physical properties.
- PVD Coating: Typically uses metallic materials and their compounds, resulting in a diverse range of metallic surfaces.
- Hardness:
- DLC Coating: Hardness can reach between 2000HV and over 9000HV, showcasing excellent wear resistance and corrosion resistance.
- PVD Coating: Hardness ranges from 1000HV to 4000HV, which is good but not as high as that of DLC coatings.
- Thickness:
- PVD Coating: Typically has a thickness of 0.5 to 5 microns.
- DLC Coating: Thickness can vary from a few nanometers to several microns, accommodating different technical needs.
- Application Fields:
- PVD Coating: Widely used in aerospace, electronics, optics, and machinery.
- DLC Coating: Primarily used in functional mechanical applications, such as drill bits, milling cutters, and scissors.
2. Application of DLC Coatings in the Watch Industry
- Material Composition and Performance:
- The carbon film structure of DLC coatings provides watches with excellent wear resistance, corrosion resistance, and lubrication. Its high hardness helps watches better resist scratches and wear in daily use, maintaining long-lasting luster.
- Application Examples:
- Many well-known brands, such as Huawei, have started using DLC coatings on their watch cases. This enhances the durability of the watches while giving them a stylish appearance that meets consumers’ dual expectations for aesthetics and performance.
- Limitations:
- Despite the many advantages of DLC coatings in the watch industry, there are some limitations. First, the color options are relatively limited, currently mainly available in steel and black, which may restrict personalization choices. Additionally, the complex production process can lead to increased manufacturing costs.
In summary, DLC coatings demonstrate advantages in wear resistance and aesthetics in the watch industry, attracting more and more brands to adopt this advanced technology. However, the existing limitations also remind us to consider the overall design and market demand when making choices.
