DLC Coatings (Diamond Like Carbon Coatings)

DLC coatings are often applied in automotive engines to achieve friction reduction on engine components (tribology). The black colour of the DLC coating makes it popular as a decorative coating on e.g. watches. In tool applications DLC coatings are advantageous because of their low coefficient of friction and non-sticking properties. DLC coatings are superior for the machining of cast and wrought aluminium and coating of plastic injection moulds
 

Diamond like carbon(DLC) coating Technology

Unique Diamond-Like Carbon (DLC) coatings developed by Sulzer include the triple-layered CAVIDUR, DYLYN, and the Tungsten-Containing Hydrocarbon CARBON WCH. Our high-tech coatings offer excellent wear protection, low frictional coefficients, and very smooth surfaces.

Coating description

The amorphous CAVIDUR coatings are especially suited for racing and other high‑performance engine applications. It is deposited by a combination of PVD and PACVD processes. To guarantee best quality and performance, we perform all CAVIDUR coatings in a clean environment. The coating temperature range is 180 – 350 °C.

Take the pole position

We can provide a range of different CAVIDUR coatings to match the differing requirements for various components in a racing engine’s powertrain. To help you evaluate the benefits, we can conduct a trial by applying CAVIDUR coatings to your existing parts.

Well established in the racing industry

For the past twenty years, professional motorsport teams in F1, NASCAR, WRC, DTM and F3 have trusted our CAVIDUR coatings to deliver the performance they require. Motorcycle components can also benefit from the advantages of this treatment.

Advantages

  • Performance boost
  • Reduces friction
  • Reduces wear and extends part life
  • Increases part reliability
  • Protects both coated component and uncoated counterpart

Typical applications

  • Piston rings
  • Valve train components
  • Oil pump shafts

DYLYN Coating description

Plasma Assisted Chemical Vapor Deposition (PACVD) is well-established for DLC layer deposition. The process activates chemical reactions through plasma excitation and ionization.

We frequently apply the amorphous DYLYN coatings to parts and components for the engineering, automotive, plastics processing, and semiconductor industries. To guarantee best quality and performance, we perform DYLYN coatings in a clean environment. The coating temperature range is 180 – 220 °C.

To meet the growing demand for coating treatments, we have streamlined the complete coating process of your parts between our system manufacturing and coating departments. Our handling expertise for all kind of parts complete the performance portfolio.

Advantages

  • Low surface energy
  • Low micro porosity
  • High hardness
  • Low friction
  • Biocompatible
  • Excellent adhesion
  • Can be tailored with respect to electrical conductivity and hydrophobic and hydrophilic behaviour

Typical applications

  • Components for the automotive, engineering, and semiconductor industries
  • Moving and form-giving mold components
  • Caps and closures
  • Ejector pins and bushings
  • Blow mold and forms for PET cores and bottles

The DLC coating CARBON WCH provides a low coefficient of friction and strong wear protection because it is highly ductile. Used in many industries, this coating has diverse applications in automotive and general machining.

Coating description

This amorphous carbon coating combines a very low coefficient of friction, low tendency to adhesion, and excellent wear resistance. With these features, CARBON  WCH is ideally suited to protect components and tools that are subjected to much tribological wear or tribo‑oxidation.

The effect of CARBON WCH relies on several correlated mechanisms related to the coating’s nanostructure. While running dry, the coating is transferred from the coated component to the opposite uncoated component, thus smoothing the two surfaces. During the coating process, the temperature is maintained at about 200 °C to enable the coating of hardened steel.

To meet the growing demand for coating treatments, we have streamlined the complete coating process of your parts through close cooperation between our system manufacturing and coating departments. Our handling expertise for all kind of parts completes the performance portfolio.

Multilayer structure consists of

  • Chromium adhesion layer
  • W-C supporting layer
  • Functional layer WC/C multilayer

Coating thickness is adjustable

Advantages:

Coating

CARBON WCH

CARBON WCHmod

color

anthracite

black

typical coating thickness

1 – 5 μm

1 – 5 μm

Hardness

1,000 – 1,200 HV

1,200 – 1,500 HV

Coefficient of friction (dry)

0.15

0.15

Advantage:

  • Good wear resistance and very low friction
  • Reduces use of lubricants
  • In many cases, it is sufficient to coat only one friction partner
  • Reduces tribological influences like friction and adhesion
  • Eliminates pitting and tribo-oxidation

Typical applications

  • Hydraulic components
  • Pneumatic components
  • Engine components
  • Medical and pharmaceutical industry parts
  • Gears
Technology