ZrN-coated knee component made by DOT GmbH

Zirconium Nitride Coatings (ZrN)


An arc with high current density is run over the target material causing it to evaporate and to release zirconium atoms, which are ionized and propelled towards the implant. During the process, nitrogen is introduced into the vacuum chamber. The ZrN coating is formed when the zirconium ions strike the implant surface and, simultaneously, combine with the nitrogen atoms.

Range of Application

  • Orthopedic implant components
  • Surgical instruments
  • Rotating instruments
ZrN-coated components

ZrN coatings only modify the surface properties. The material properties and biomechanical functionality is not altered by the coating.
  • Color: pastell yellow
  • Coating thickness: 0.5–6 µm
  • Roughness: Ra ≤ 0.05 µm
  • Adhesion strength: at least HF 1 (DIN EN ISO 26443)
  • Coating hardness: ~2,500 HV
Advantages of the Procedure
  • Higher wettability with synovial fluid
  • Low friction articulation
  • Long-term chemical stability
  • Outstanding coating adhesion

DOT offers further variations of ceramic hard coatings:

Charles-Darwin-Ring 1a
18059 Rostock l Germany

Phone: +49 381- 4 03 35-0