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Other Functionalities

Create limitless functional surfaces with our coating and treatment solutions. Properties we are able to control and enhance include biocompatibility, antibonding, friction lining, and gas permeability.

Biocompatibility

Determining compatibility with body tissue is a critical preliminary requirement for developing medical implants. The surface finish and the overall design of an implant are just as important for biocompatibility as the chemical composition. Use our coating solutions to ensure that both the physical and chemical characteristics of implants match the body tissues they are replacing.

Antibonding

We offer many different antibonding coating systems to suit specific applications. For example, thin film coatings applied to injection screws and molds combine wear resistance and antibonding properties. This improves mold filling, ejection from the mold, and surface finish.

Antibonding coating systems consist of a thermal-sprayed metallic or ceramic base coating, which is then over-coated with PolyTetraFluoroEthylene (PTFE). The wear resistance of the bottom layer provides better service life and durability over conventional PTFE coating. This type of coating system is used in the food, paper, printing, and packaging industries.

Friction linings

The latest compact and lightweight transmissions require improved friction linings.

Components that employ friction linings include:

  • Synchronizers
  • Multidisk clutch assemblies
  • Transducer clutch assemblies
  • Gears

You can rely on Oerlikon Metco’s surface treatments to meet these components’ requirements for:

  • Constant frictional coefficients
  • Wear resistance
  • Oil-tolerant surfaces
  • Good overload behavior
  • Suitability for continuous slip applications

Permeability

Thermal-sprayed coatings always exhibit a certain amount of porosity. The gas permeability of the coating increases with higher porosity.

In metallic and ceramic coatings, the degree of porosity can be controlled. The coating must still remain structurally sound, and the porosity must be homogeneously distributed throughout the coating. 

Coating applications requiring a high amount of porosity control include:

  • Clearance control coatings (abradables)
  • Oxygen sensors for automotive engines, where a gas permeable coating is used to control the oxygen that reaches the sensing mechanism  
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