Knowledge What is the Base Material of DLC Coating? 4 Key Points to Understand Diamond-like Carbon
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Tech Team · Kintek Solution

Updated 1 month ago

What is the Base Material of DLC Coating? 4 Key Points to Understand Diamond-like Carbon

The base material of DLC (Diamond-like Carbon) coating is primarily composed of carbon, often with a significant amount of hydrogen.

This composition results in a material that exhibits properties similar to diamond, including high hardness and excellent wear resistance.

4 Key Points to Understand Diamond-like Carbon

What is the Base Material of DLC Coating? 4 Key Points to Understand Diamond-like Carbon

1. Composition of DLC

DLC is an amorphous form of carbon that contains a significant proportion of sp3 hybridized carbon atoms.

These are the same type of bonds found in diamond, giving it its diamond-like properties.

The presence of hydrogen in most DLC coatings further enhances its properties by modifying the structure and reducing residual stresses in the film.

2. Deposition Techniques

DLC coatings are typically deposited using techniques such as Radio Frequency Plasma-Assisted Chemical Vapor Deposition (RF PECVD).

This method involves the use of hydrocarbons, which are compounds of hydrogen and carbon, in a plasma state.

The plasma allows for the uniform deposition of the DLC film on various substrates, including metals like aluminum and stainless steel, as well as non-metallic materials like plastics and ceramics.

3. Properties and Applications

The unique combination of carbon and hydrogen in DLC coatings results in high hardness, low friction, and excellent wear and chemical resistance.

These properties make DLC coatings ideal for applications requiring high specific strength and wear resistance, such as in automotive components (e.g., pistons and bores), VCR heads, copier machine drums, and textile machinery components.

Additionally, DLC's anti-sticking properties make it suitable for tool coatings, particularly in the machining of aluminum and plastic injection molds.

4. Environmental and Performance Aspects

DLC coatings are considered environmentally friendly as they involve the reuse of carbon and hydrogen during the deposition process.

The plasma-based deposition ensures a uniform and high-quality finish, comparable to other metal coating solutions.

The thin film nature of DLC coatings (typically 0.5 to 5 microns) ensures that they do not significantly alter the dimensions of the engineered parts they are applied to.

In summary, the base material of DLC coating is primarily carbon, often hydrogenated, which imparts diamond-like properties such as high hardness and wear resistance, making it a versatile and valuable coating for a wide range of industrial applications.

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