“This technology enables us to examine coatings and surfaces non-destructively, quickly, and very accurately,” explains project manager Dr. Stefan Makowski, who heads the Coating Characterization Group at Fraunhofer IWS. “With LAwave, we are now taking the step towards industrial application.” Specific fields of application can be automotive engineering, surface coating and microelectronics. For instance, laser-induced surface acoustic wave spectroscopy can evaluate cracks and pores on thermally sprayed surfaces without destroying the component, as with conventional cross-sectional examinations. Removing damage layers on silicon surfaces can be examined in the semiconductor industry. LAwave technology provides a suitable method for quality control of PVD coatings, such as wear-resistant and friction-reducing coatings made of diamond-like carbon on motorcycle chains and engine components.
Potential for Environment and Health
LAwave-supported analysis of the latest brake disc generations opens up great potential for protecting the environment and health: The vehicle industry is gradually moving towards coating steel discs with particular coatings of hard metal, ceramic, or other materials to reduce abrasion and corrosion. This should ensure that cars and motorcycles meet the EU's increasingly strict particulate matter limits. On the other hand, manufacturers are preventing unwanted side effects by switching to electric drives: Electric vehicles often only use the engine brake to recharge their batteries via recuperation. They use the conventional wheel brakes less often – and these consequently corrode earlier. The additional layers mentioned above can significantly reduce both problems, although they cannot yet be tested non-destructively. This is where LAwave steps in.
Continuous Development and Improvement
Early measurement systems of this type required complicated evaluation and were usually only operated by specialized scientists. Over the past 20 years, universities and non-university institutes have used those systems. Since then, however, Fraunhofer IWS has continuously developed and improved the technology and software and collaborated with partners to improve the design's user-friendliness. A cooperation between Fraunhofer IWS and the Chair of Technical Design at the Technical University of Dresden (TUD) contributed to this.
Fraunhofer IWS is currently developing further technological improvements to open up new fields of application for LAwave. For example, artificial intelligence can significantly improve the quality of analysis even further. A mobile LAwave measuring head also is on the agenda. Its design will allow the surface analysis of internally coated tubes, rollers, and other particularly heavy, large, or complex-shaped machine components that cannot be handled in a stationary device.
The current LAwave measuring system will be on display from April 23 to 26, 2024 at “Control”, booth 8201 in hall 8 at Messe Stuttgart. Visit us also from April 29 to May 1, 2024 at “ITSC Expo”, booth 111 at Milan, Italy or from September 2 to 5, 2024 at “PSE 2024” in Erfurt.
Fraunhofer Institute for Material and Beam Technology IWS
