Abstract
PM304 coating on a Ni-based superalloy rod for high temperature lubrication has been prepared by high-energy ball milling and powder metallurgy techniques. The composition of the PM304 coating is the same as that of PS304 coating, but the microstructure is quite different. The microstructure of PM304 coating is fine and dense; the size of self-lubricating particles in the coating is very small. Self-lubricating Cr 2O 3 particles are about 100 nm, BaF 2/CaF 2 particles about 1 μm, Ag particles below 5 μm, while BaF 2/CaF 2 and Ag particles precipitated from NiCr matrix are less than 50 nm. The fine and dense microstructure results in increased tensile strength and crack growth resistance of PM304 coating. The mean tensile strength is about 46 MPa.
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.
