Evaluation of tin coatings produced via different techniques

TiN coatings were created on Ti-6A-14V substrate using two different techniques, namely PVD and heat treatment under controlled atmosphere. The aim was to choose one of these techniques to employ for creating TiN deposits of known size, shape and location on the surface of a titanium alloy block. This surface was later to be bonded to another titanium alloy block via diffusion bonding, thus encapsulating the TiN deposits in the metallic body. Such titanium bodies carrying TiN as synthetic defects can be used as calibration blocks in ultrasonic inspection of titanium alloy parts in aircraft industry. The TiN coatings produced via two methods were characterized using Confocal Raman, Atomic Force Microscopy (AFM), XRD, scratch test as well as scanning electron microscopy (SEM) techniques.