Abstract
Cr3C2–25NiCr coatings are essential to provide protection against both wear and corrosion of superalloys particularly in the temperature range up to 900–1000°C. The Cr3C2–25NiCr coatings were deposited on the Fe and Ni based superalloys by D gun spray technique and subsequently investigated for their microstructural characteristics such as coating thickness, porosity, phase formation, microhardness, surface and cross-sectional morphologies. The coatings showed a dense microstructure with porosity contents less than 0·69%. The carbide grains of different size are uniformly cladded with the metallic binder and located around the splat boundaries as observed in the coatings. Lower carbide dissolution and its uniform distribution ensured a better binder protection in the coatings. High cohesive strength of the individual splats and high volume fraction of carbides contributed for the higher microhardness values of the coatings (775–1200 HV).
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.
