Affiliation:
1. Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China
Abstract
In order to improve the wear and corrosion resistance of Ti6Al4V alloy, a Ti-N compound layer was formed on the alloy by plasma nitriding at a relatively low temperature (750 °C) and within an economical processing duration (4 h), in a mixture of NH3 and N2 gases with varying ratios. The influence of the gas mixture on the microstructure, phase composition, and properties of the Ti-N layer was investigated. The results indicated that the thickness of the nitrided layer achieved in a mixed atmosphere with optimal proportions of NH3 and N2 (with a ratio of 1:2) was substantially greater than that obtained in an atmosphere of pure NH3. This suggests that appropriately increasing the proportion of N2 in the nitriding atmosphere is beneficial for the growth of the nitrided layer. The experiments demonstrated that the formation of the surface nitrided layer significantly enhances the corrosion and wear resistance of the titanium alloys.
Reference36 articles.
1. Improved structural, mechanical, corrosion and tribocorrosion properties of Ti45Nb alloys by TiN, TiAlN monolayers, and TiAlN/TiN multilayer ceramic films;Ceram. Int.,2021
2. Multicomponent and multiphase hard coatings for tribological applications;Hermann;Surf. Coat. Technol.,2000
3. Electrochemical and biological properties of mono-and bilayer nitride coatings deposited on Ti-6%Al-4%V alloy;Kamkar;Mater. Chem. Phys.,2022
4. Structure, mechanical and tribological properties in seawater of multilayer TiSiN/Ni coatings prepared by cathodic arc method;Ye;Appl. Surf. Sci.,2019
5. Corrosion and tribocorrosion behaviour of titanium nitride thin films grown on titanium under different deposition times;Alves;Surf. Coat. Technol.,2019