Precious Coatings for Plastic Parts (IMAGE) Fraunhofer-Gesellschaft Caption This is a plastic cage coated with diamond-like carbon: Bearings achieve much higher engine speeds with parts coated in this way. Credit Fraunhofer IWM Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.