Results
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Plasma chemical etching for c-Si photovoltaics
Structuring of TCO layers for TF-Photovoltaics
Infection control – Process and materials studies
Application demonstrator for infection control
Energy storage – Process and materials R&D
Application demonstrator for energy storage
Interface technologies for durable adhesion
Application demonstrator for interface technologies
Cross-cutting equipment development
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Interface technologies for durable adhesion
Lab-scale test bench coater for flat and (slightly) 3D shaped components in operation, plasma source is an extended DC-Arc with 150 mm working width
© Fraunhofer IWS
By atmospheric pressure Ar-N2 plasma treatment superimposed nanostructure
© Fraunhofer IWS
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Development of interface technologies to improve bond strength of adhesively bonded or painted components in the aerospace, automotive and steel industry
- aeronautic industry: increase of bond strength on titanium and carbon fibre reinforced plastic substrates (CFRP) of adhesively bonded parts
- automotive industry: reduction of failure rate of painted thermoplastic surfaces (polypropylene) compared to state-of-the-art process flaming
- steel industry: bond strength and durability of stainless steel and organic pre-painted galvanised steel for industrial applications, e.g. lightweight construction, assuring process stability and improved adhesion
Equipment development
- atmospheric pressure plasma lab scale equipment used for process development of interfaces by chemical surface modification or surface coating to improve bond strength on flat substrates
- in parallel a technology head has been developed being designed for robot based use for processing of big 3D shaped components
Simulation of gas flows during deposition
© Fraunhofer IWS
Process development
- coating of Titanium with SiOx: bond strength and durability close to industrial reference (which must be substituted)
- aerosol assisted DBD plasma treatment of pre-coated stainless steel: improves adhesion to thermoplastic polymer foils for sandwich panels - cohesive failure in the polymer film
- SiOx coatings on stainless steel: fulfil the requirements for adhesive bonding using the atmospheric plasma coater head device
- activation and surface modification of CFRP: bond strength of adhesively bonded specimen match the requirements being set up by aviation industry
- activation of PP material for painting: sufficient with max. distance between plasma head and the substrate of 7 cm with a treatment speed of 20 m/min
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