Stoffverbund und Verfahren zu dessen Herstellung

摘要

The invention concerns a composite with a substrate and a layer, consisting essentially of pure sp<2>- and sp<3>-hybridized carbon, which has a first surface facing the substrate and a second, exposed, surface. The invention also concerns a method of manufacturing the composite. The aim of the invention is to improve adherence to the substrate and to minimize internal stresses, while maintaining high surface hardness. This is achieved by virtue of the fact that the layer is graded in nature, the proportion of sp<3>-hybridized carbon increasing towards the second, exposed, surface. The method proposed for manufacturing the composite calls for a layer of carbon to be applied, using PVD techniques, to a substrate in such a way that, during manufacture, the pulse input into the layer is either continuously or discontinuously increased as the thickness of the layer increases.