Schichten aus kubischem Bornitrid (cBN) für innovative Anwendungen

Coatings of cubic boron nitride (cBN), the second hardest of all known materials, were prepared using a sputter process.A new coating design, based on a special B-C-N layer system, allows to deposit thick (> 2µm) cBN films, however so far only on silicon substrates. The properties of the coatings are quite similar to those of bulk cBN. Promising experiments wer performed with respect to a transfer of this application relevant layer system to cemented carbide and steel substrates. First measurements of the mechanical and tribological properties confirmed the outstanding properties and the high potential of such cBN based coating systems.