Cold plasma spraying

The work of the Application Center in the field of plasma coating focuses on plant and process developments that permit to coat in particular thermally sensitive objects. The use of a cold-regulated plasma jet makes this possible. The corresponding technology, cold plasma spraying, is based on processing particles of ultra-fine morphology. 

Diversity of coatings

The work of the Application Center in the field of plasma coating focuses on plant and process developments that permit to coat in particular thermally sensitive objects. The use of a cold-regulated plasma jet makes this possible. The corresponding technology, cold plasma spraying, is based on processing particles of ultra-fine morphology. 

  • Metals, such as Cu, Al, Ag, Sn, Ti, Wo, Fe, steel
  • Metal oxides, such as Al2O3, SiO2
  • Plastics, such as PE, PVDF, PTFE

With this process not only track structures can be created but also full-area coatings and gradient layers. In addition, a good depth-going capability means that even complex three-dimensional objects can be coated homogeneously. 

Wide range of material 

The classes of materials which can be coated by cold plasma spraying are diverse. A number of examples are given below, including extremely heat sensitive materials: 

  • Natural materials such as paper, wood, organic-fiber composite materials, cotton
  • Polymers such as PA, PE, in particular also on thin polymer films
  • Elastomers such as TPE
  • Fiber-reinforced composite plastics, including FRP and CRP
  • Glass of different types, in particular extremely thin glass
  • Ceramics
  • Metal foils
  • Textiles

Advantages of the technology

Process characteristics of cold plasma spraying are a high deposition rate, the coating speed, and a maximum degree of automation. The technology is thus suitable for the mass production of products. Its advantages over state-of-the art coating methods comprise:

  • No need for binders
  • No need for wet-chemical processes
  • No additional tools required
  • Pretreatment of the substrates is not neccessary

Examples of the application

Conductor tracks made of high-melting-point metals and anti-static tracks can be applied by cold-plasma spraying to thermally sensitive fibers, fabrics, and plastics. Among other things this opens up innovative approaches to producing intelligent textiles. 

The technology can also be used for start metallizations on polymer objects which can be galvanically reinforced in subsequent processes. In this way, conductors can be laid down on injection-molded circuit carriers  –  so-called MIDs (molded interconnect devices)  –  without pollutive chemical pretreatment. 

In addition, the technology can deliver a diversity of coating functions, such as: 

  • High thermal conduction
  • Reduction in the coefficient of friction
  • Antimicrobial functional layers
  • Adhesion promotion
  • Anti-adhesion
  • Barrier layers
  • Decorative coatings

Our offer

  • Development of individual coating designs and multi-layer systems
  • Process development
  • Development of system components for specific applications

 

More information

Applied cold plasma spraying