Diamond-like carbon films – DLC

Amorphous diamond-like carbon films (diamond-like carbon DLC) are wear-resistant and low-friction. DLC films are precipitated using PACVD or PVD processes. 

The characteristics of the layers can be specifically configured within a wide range depending on the production process, precipitation conditions and composition. These extensive variation possibilities of the film characteristics have led to a number of different carbon coatings with a variety of applications in the last few years.

The combination of high wear resistance with outstanding friction and anti-adhesion properties makes DLC films an ideal surface refinement for components and tools exposed to tribological stresses.

Fraunhofer IST adapts DLC coatings for specific applications. High-performance products with multifunctional surfaces and new characteristics are realized as a result.

Characteristics and benefits

• Precipitation temperatures < 200 °C
• Typical coating thicknesses: 1 μm to 10 μm
• Low friction values
• High wear resistance
• High hardness with simultaneous above-average elasticity (E/H ≈ 10)
• Anti-adhesion properties are possible
• Customisable electric conductivity
• Corrosion-resistant coating material
• Can be precipitated on most materials

Applications

Machine elements:

• Drive elements, for instance gear wheels, shafts, axles, chains
• Sealing elements such as slide ring seals and ball valves
• Bearing elements, for instance slide bearings, ball bearings, guide elements
• Piston/cylinder pairs, for instance dampers, pistons for motors, pumps, compression

Tools:

• Original moulds such as die casting moulds
• Forming dies such as deep-drawing dies
• Cutting and punching dies
• Compression moulding dies such as punches, die plates

Further information

Thermally stable DLC coatings

DLC coatings for fouling reduction

Anti-adhesion coatings

DLC coatings for forming