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

Investigation of the Usability of Cubic Boron Nitride Cutting Tools as an Alternative to Diamond Cutting Tools for the Aircraft Industry

“…cBN is a material with huge potential in the cutting tool industry [10,11]. cBN tools are produced using cBN and ceramic or metal binders under high pressure and high temperature.…”

Surface technology for automotive engineering

“…In the last few years there has been impressive progress in the field of thick (>1 mm) cBN coatings. Some research groups succeeded in deposition of thicker cBN, up to 20 mm [10,99,175,192]. In spite of the impressive results reported and several techniques which were described for deposition of thicker cBN films, no successful transfer of cBN deposition processes to industrial coating machines could be realized so far.…”

“…Thick cBN coatings (up to 2 mm) were deposited as top layers on cemented carbide cutting inserts pre-coated with TiAlN [99,136]. The deposition processes were done by reactive sputtering using a boron carbide target.…”

Modern materials for forming and cutting tools – overview

“…The state-of-the-art is the use of sintered cutting inserts with cBN grains. Such c-BN grains are synthesized in an expensive high-pressure -high-temperature process [27]. The wear of cBN tools is significantly lower than with cermet tools and the life time of the cBN tools is corresponding higher.…”

“…With the attempt of hard coating buffer layers, e. g. TiN or TiAlN and c-BN-layer system, it is possible to achieve c-BN layer thicknesses on cemented carbide cutting tools of more than 1 lm. Concerning the machining test results with cutting inserts coated with the c-BN layer systems, it has to be noted that in turning and milling tests the potential of c-BN layer could clearly be demonstrated [27]. But the adhesion of the c-BN-layer systems for intermittent cutting operations has still to be improved.…”