Abstract
Abstract The electro-thermal explosion ultrahigh speed spraying technology was employed to prepare the NiAl coatings with 0, 10, and 20 wt.% TiB2 on the Ni-based super-alloy substrate. The Microstructure, phase structure, and hardness of coatings were analyzed by scanning electron microscopy with energy dispersive X-ray spectrometry, X-ray diffraction, and Vickers micro-hardness tester, respectively. The results showed that the coatings had dense microstructure with submicron grains. The addition of TiB2 as a particulate reinforcement increased the hardness of NiAl. The isothermal oxidation test of coatings at 1000 °C for 140 h in air was investigated. The results showed that the oxidation resistance of NiAl coatings was higher than that of NiAl-TiB2 coatings at high temperature. The oxides and morphologies of the above coatings were investigated. The Al2O3 was formed on NiAl coating surface, while Al2O3 and TiO2 were formed on NiAl-TiB2 coating surface after oxidation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
