In-situ oxide-free titanium nitride coating by conventional plasma spraying with improved properties
By Gupta, Rohit; Islam, Aminul; Pandey, Krishna Kant; Ranjan, Shreshtha; Singh, Ravi Kumar; Mukherjee, Biswajyoti; Keshri, Anup Kumar
Published in Ceramics International
2019
Abstract
We report in situ fabrication of oxide-free titanium nitride (TiN) coating by conventional plasma spraying technique. Complete oxide free TiN coating without using low pressure or vacuum environment was achieved by using the N2 shroud with plasma spraying. X-Ray diffraction and Transmission electron microscope confirmed the absence of any traces of oxide in the coating. Coating showed exceptionally higher mechanical properties (H: ?18 GPa; E: ?317 GPa). Outstanding reduction of ?15 times in wear rate and ?4 times in corrosion rate was observed compared to bare substrate (i.e. Ti-6Al-4V).