Nano-scale, multi-functional coatings in the material system B–C–N–H

Thick c-BN coatings – Preparation, properties and application tests

“…The combination of high hardness, very low abrasive wear rates and relatively low friction coefficient with a sufficient adhesion to the tool substrate confirm the potential of c-BN and the concept of different buffer layers. The concept of buffer layers was meanwhile confirmed to be promising also by other research groups [10,18,19]. Concerning the machining test results with cutting inserts coated with the c-BN layer systems, it has to be noted that in turning tests the potential of c-BN layer could clearly be demonstrated.…”

“…Some research groups succeeded in deposition of thicker c-BN and reported their results in recent publications [5][6][7][8][9][10]. In spite of the useful and impressive results in the publications and the several techniques which were described for deposition of thicker c-BN films in the publications, most techniques have some drawbacks for a transfer to industrial use.…”

“…The techniques described in [9,10] seem to be more suitable for transfer to industrial use. In both publications the deposition process is a PVD sputtering technique, which is commonly used in the industrial deposition technology.…”