SYNTHESIS AND CHARACTERIZATION OF TiN, TiAlN AND TiAlN/Si3N4 CHEMICAL NANOCOMPOSITE

Abstract

Nanocomposite coating is a coating with measurements of grain size or individual layers which could be less than 100 nm and it offers enriched durability and performance. The objective of this article is to present the chemical and mechanical characteristics of nano-coated cutting tools. To improve the machinability and tool life, the cutting tool inserts are coated with nanoparticles of nitride coatings using titanium nitride, titanium aluminium nitride and titanium aluminium nitride with silicon nitride. With the advent of nano composites, a coating of thickness in nanometers has become a reality. The nano coatings are carried out through physical vapor deposition process on thin films, get experimentally tested and are coated on cutting tool insert. These TiN, TiAlN and TiAlN/Si3N4 have been adopted due to their better chemical and mechanical properties. Enrichment of hardness is an important criteria and maximum hardness is obtained through multilayer structurization of composites. In this experimental analysis, the various mechanical properties of thin films like hardness, Young's and reduced modulus of thin films were found through a method called nanoindentation, which was carried out on nine different samples of titanium nitride and the results were interpreted.