DLC Coatings

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DLC MIDA (Diamond Like Carbon)

DLC coatings, an acronym for Diamond-Like Carbon, represent an advanced technological solution to enhance the performance and longevity of mechanical components and molds.

Thanks to their unique structure, which combines the characteristics of diamond with those of graphite, DLC coatings offer an unparalleled mix of hardness, resistance, and smoothness.

Techno Mida S.r.l., a center specialized in wear-resistant and anti-oxidation coatings, serves as a reference point for the application of custom DLC coatings, ideal for meeting the needs of a wide range of industrial sectors. Our mission is to provide innovative solutions that ensure maximum efficiency and reliability, helping to reduce maintenance costs and improve productivity.

With the rapid advancement of technologies and increasing demands for resistance and performance, DLC coatings have become an essential element for industries seeking to maintain a competitive edge.

Delivery times may vary from 3 business days to one week.

Below are some examples of DLC coatings:

What is DLC and how does it work?

DLC (Diamond-Like Carbon) is an amorphous carbon-based coating that possesses a unique combination of diamond-like properties, such as high hardness and low friction, and graphite properties, such as thermal and electrical conductivity. This coating is obtained through advanced plasma-assisted chemical vapor deposition processes, known as PACVD (Plasma Assisted Chemical Vapor Deposition).

Application Process:

PACVD Technology: Through this technique, the coating is deposited in a low-pressure plasma environment, ensuring uniform adhesion even on complex geometries.
Main Phases: Surface preparation, plasma creation, controlled deposition, and post-application treatments to ensure maximum quality.
Quality Control: Each phase is monitored to ensure that the coatings meet strict performance standards.

DLC Variants: There are different types of DLC, including hydrogenated (a-C:H) and non-hydrogenated (a-C) coatings, each with specific characteristics for targeted applications.

Thanks to PACVD technology, DLC coatings offer significant advantages in terms of wear resistance, friction reduction, and corrosion protection, making them an indispensable choice for high-performance components.

Properties of DLC Coatings

Technical Data:

Coating Properties	DLC MIDA
Coating Structure	Monolayer
Lattice Structure	Amorphous
Microhardness	2000 – 4000 HV
Coefficient of Friction	< 0.1
Maximum Service Temperature (°C)	400
Coating Color	Black (Anthracite)
Coating Properties	Flash Cr + DLC MIDA
Microhardness	> 2000 HV
Coefficient of Friction	< 0.1

DLC coatings stand out for a range of extraordinary properties that make them ideal for numerous industrial applications. Thanks to their versatility and superior performance, they represent an indispensable solution for those seeking durable and reliable components.

Key Properties:

High Hardness: The amorphous structure of DLC ensures extreme resistance, similar to that of diamond.
Low Coefficient of Friction: Improves component efficiency by reducing wear from friction.
Corrosion Resistance: Protects underlying materials from aggressive chemicals and oxidation.
Chemical Inertia: Compatibility with a wide range of environments and substances.
Thermal Properties: Ability to operate under variable temperature conditions without losing effectiveness.

Application Advantages:

Increased Component Lifespan: Reduction of failures and downtime.
Reduced Maintenance Costs: Thanks to greater wear and corrosion resistance.
Performance Improvement: Superior efficiency in critical applications and under high loads.
Versatility: Suitable for multiple materials and sectors, from medical to automotive, including mechanical and aerospace industries.

DLC Application Sectors

Thanks to their versatility and excellent mechanical and chemical properties, DLC coatings find application in a wide range of industrial sectors. Here are some of the main areas of use:

1. Automotive Sector:

Engine components, such as pistons, camshafts, and bearings.
Injectors and fuel systems.
Parts subject to high wear that require low friction and high resistance.

2. Mechanical Industry:

Molds for metal and plastic processing.
Cutting and drilling tools.
Components subject to mechanical stress and aggressive environments.

3. Medical Sector:

Surgical instruments and medical devices.
Prostheses and implants, thanks to biocompatibility and corrosion resistance.

4. Aerospace Sector:

Components subject to high wear and extreme conditions.
Transmission systems and aircraft engine parts.

5. Electronics and Semiconductors:

Protective layers for circuits and electronic devices.
Optical components and surfaces subject to scratches or oxidation.

6. Custom Applications:

Customized solutions for specific needs in other sectors, such as energy or food.

On which materials to apply DLC

Tool steels
Stainless steels (Austenitic-Martensitic)
Precipitation-hardened steels
Structural steels
Nitrided steels
Nickel and Titanium alloys
Special steels for rolling bearings
Hardenable chromium steels
Copper and its alloys with intermediate Hard Chrome Flash coating
Ceramic inserts
Hard metal

Advantages of DLC

Maximum Hardness
Minimum Thickness
Biocompatible
Minimal Friction
Low Deposition Temperature
Excellent non-stick effect

Greater wear and corrosion resistance

The DLC MIDA (Diamond-Like Carbon) coating offers effective protection on molds and components subject to severe sliding wear. The coating, which is also well-adherent and homogeneous, is characterized by excellent chemical resistance and is unaffected by acidic or alkaline solutions and organic agents. The surface hardness conferred by the coating preserves the mold from wear caused by polymers loaded with fibers of all kinds, protects mirror-polished or satin surfaces, safeguarding the mold from corrosion.

Improved Product Quality

The protection of the DLC coating extends the lifespan of equipment and during molding reduces cycle time, improving productivity. The molding process benefits as the plastic mass slides away more easily, avoiding distortions or sticking in unwanted parts. The black (anthracite) DLC coating does not alter the surface roughness of the substrate in any case. The deposition growth occurs through a PACVD (Plasma Assisted Chemical Vapor Deposition) coating process that allows limiting the substrate temperature during deposition, avoiding deformations or structural changes in the alloys.

Characteristics of DLC MIDA Treatment

High hardness and low coefficient of friction
Increased resistance to abrasive and sliding wear
Ability to coat high-wear objects on fittings with tight tolerances
Coating not composed of heavy metals
Biocompatible and food-neutral coating
Excellent non-stick effect
Excellent chemical resistance (coating unaffected by Acidic or Alkaline solutions)
Excellent adhesion on Nitrided and Chromed surfaces

FAQ – Frequently Asked Questions

1. What materials can be coated with DLC? DLC coatings are suitable for a wide range of materials, including steel, titanium, aluminum, and other metal alloys, as well as non-metallic substrates such as ceramics and some polymers.

2. What are the temperature limits for DLC coatings? DLC coatings maintain their properties up to temperatures of about 350°C. For applications at higher temperatures, specific DLC variants can be used.

3. How long does a DLC coating last? The duration depends on the specific application and operating conditions. In general, DLC coatings offer superior wear resistance compared to other conventional coatings.

4. Is it possible to coat already worn components? Yes, provided that the components are restored to their original specifications before the DLC application. Otherwise, it is advisable to apply the coating to new components.

5. What are the average delivery times? Delivery times vary based on the complexity of the project and the order volume. Generally, the process takes between 1 and 3 weeks.

6. Are DLC coatings biocompatible? Yes, DLC coatings are biocompatible and widely used in the medical sector for surgical instruments, prostheses, and implants.

7. Can I request a sample or consultation? Certainly! We offer free samples and technical consultations to help you evaluate the most suitable solution for your needs.