CERODEM® DLC ST

CERODEM® DLC ST

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Diamond-like carbon layer with CrN intermediate layer. Resistance to wear with increased load-bearing capacity.

The combination of a diamond-like carbon layer (CERODEM® DLC) and a chromium nitride intermediate layer (CERODEM® CrN) in a multilayer coating system offers a unique synergy of properties that meets the requirements of highly stressed components. The CERODEM® DLC layer is characterised by its outstanding wear resistance and low friction, even under the toughest conditions and high sliding speeds. By minimising frictional losses, this coating is ideal for a wide range of applications where a low-friction surface is crucial.

The CERODEM® CrN intermediate layer acts as a base layer and provides additional wear protection, especially at higher surface pressures. In addition, the CERODEM® CrN layer gives the multilayer system exceptionally good corrosion protection, even in aqueous environments. The combination of these properties creates a high-performance coating system that significantly increases the service life of stressed components.

The outstanding sliding properties of the CERODEM® DLC coating open up a wide range of possible applications. From pumps and compressors, ball bearing housings and rollers to textile machines and mobility applications, numerous branches of industry benefit from the advantages of this coating. By reducing friction and wear, the CERODEM® DLC-CrN multilayer helps to increase the efficiency, reliability and longevity of components, thereby optimising processes and reducing operating costs

Advantages 

  • Combination of CERODEM® CrN multilayer coating and diamond-like carbon layer (CERODEM® DLC) for superior properties
  • High hardness thanks to the CrN multilayer coating as a base
  • Excellent wear protection thanks to the combination of both layers
  • Excellent corrosion resistance for use in demanding environments
  • Extremely high hardness of the CERODEM® DLC layer for improved abrasion and scratch resistance
  • Low coefficient of friction for reduced friction and wear
  • Extended service life of the coated components due to reduced wear
  • Versatile application possibilities in various industrial sectors such as automotive, aviation, manufacturing technology, medical technology and the food and chemical industries
  • Increasing the performance and longevity of components
  • Reduction of downtimes and maintenance costs
  • Flexibility in application thanks to partial coating options
  • Possibility of internal coatings, albeit to a limited extent
  • Colour variations between iridescent, grey and black depending on composition and layer thickness
  • Optimisation of components in a wide range of industries
  • Increased competitiveness through improved product performance and reduced costs

Specifications

Multilayer PVD-PACVD process
CR-PVD - Multilayer as base layer
A-C:H graded functional layer
Layer thickness:
2 - 8 µm
typ. 4 +- 1 µm
Coating temperature
<180°C
(lower temperatures on request)
Part size
up to 150mm D
up to 450mm L
Contact points are required
Partial coating is possible
Internal coating
limited
Colour
grey - black

Physical properties

Density:
1.8 to 2.3 g/cm3
Thermal expansion:
2 x 10-6 /K
Thermal conductivity:
<200 W/mK
E-modulus:
130-180 +- 10 GPa

Mechanical properties

Excellent load capacity
Excellent resistance to abrasive wear
Improved corrosion resistance
Optimised for low mating body wear
Hardness (ISO14577)
< 18-25 GPa
Thermally stable
< 350°C
Residual stress
1-2 GPa compressive stress
Coefficient of friction
<0.1 dry vs. steel

Industries

  • Racing industry
  • Automotive industry
  • Machine components
  • Textile
  • Food industry
  • Aerospace industry
  • Toolmaking industry
  • Defence industry
  • Leisure equipment
  • 3D printed metal parts

Process variants

  • Low temperature
  • Multi-layer coating with galvanic layers
  • Variation of coating hardness
  • Shrink coating
  • Optional mechanical pre-treatment by polishing or blasting