Mechanical Properties and Tribological Behavior of Multilayer Intermetallics Ti-Al-N/Ti-Al Coatings Deposited by Vacuum Arc Plasma

Abstract

In this work, multilayer coatings with alternating macro layers (layers formed during one gas change Ar or N2) TiAl / TiAlN were investigated. The study was divided into two stages. At the first step, the optimal ratio $S$ of the thickness of the nitride macro layer (hTi-Al-N) to the macro layer formed in argon (hTi-Al) was determined. After that, laboratory studies of the physicomechanical properties of coatings with different $S$ values ($S \gg 1, S = 1, S \ll 1$), and production tests of end mills with these coatings were carried out. According to the results of the tests determined the optimal value of $S$ providing the greatest value of tool life. The next step, to determine the thickness of the macrolayers (hTi-Al-N) and (hTi-Al) providing the greatest mechanical and functional properties of the developed coatings was studies