Characterization of TiAlN and TiN Coating on High Speed Steel using Ion Beam and Cathodic Arc Deposition Techniques

Abstract

This paper deals with the characterization of TiAlN and TiN thin film coating over the high speed steel substrate. TiAlN and TiN coatings were done using two different processes in an effort to compare the coating properties of the two processes. The two processes employed are cathodic arc evaporation technique and the ion beam deposition technique. The coated material was subjected to different types of tests to determine their properties. The thickness of TiAlN coated over high speed steel found to be 1.4 microns and the thickness of TiN was found to be 2.9 microns. The scratch test was conducted to determine the maximum scratch load the coating can withstand; the value of TiAlN was found to be 4 kg and the value of scratch load the TiN coating withstood was 3.8 kg, proving that TiAlN coating is more resistant to scratches.