2021

chapter in monograph

english

EN It can be stated that adhesion of coating to substrate depends on several factors, i.e., parameters of the coating process, kind of coating and substrate and in particular surface preparation of the substrate. The paper aims at showing that special preparation of substrate surface results in increased adhesion of super-hard, wear-resistant coatings deposited on cutting insert made of sintered carbides. During investigations, the surfaces of the cutting blades made of sintered carbides were prepared by the following different procedures: chemical etching, degreasing with subsequent ultrasonic cleaning, low- and high-temperature sputtering of substrate surface. Boron nitride coatings were deposited on the sintered carbides by the pulse-plasma method at different values of discharge voltage. The adhesion force (critical load) of the coatings to a substrate was estimated using the scratch test. Obtained results of investigations pointed to the influence of a surface preparation on critical load values. Essential influence of the discharge voltage on the adhesion was observed. The critical load results received during the scratch test were confirmed by observations of a scratches using scanning electron microscope and X-ray microanalysis images. In order to observe how the system coating–substrate deforms under the influence of a loaded diamond stylus and the details of the surface morphology before and after depositing the boron nitride coating on the substrate, tests were carried out using a profilometer. The purpose of the research, which was to define the parameters of the production process of coatings with cubic boron nitride, at which a coating with the most favorable technological properties (good adhesion, dense structure) is obtained, was fully implemented.

18.02.2021

179 - 197

10.1007/978-3-030-68277-4_13

https://link.springer.com/chapter/10.1007/978-3-030-68277-4_13

Materials Design and Applications III

20