Abstract
An NbC-reinforced Fe-based composite coating was fabricated through laser cladding. NbC phases existed as particles, polyhedrons, dendrites, and networks in the coating. The liquid–solid interface engulfed the NbC particles in the early stages of solidification, thereby decreasing their sizes. Polyhedral NbC phases evolved from NbC particles that were not engulfed by the interface through a long growth process. Dendritic and network NbC phases presented as eutectic substances that formed in the terminal stages of solidification. The Nb content in the coating decreased because of metal matrix dilution. The dilution rate of Nb was similar to that of the coating. Moreover, not all of the Nb in the coating can react with carbon to form NbC. Approximately one-third of the Nb existed in the coating as solid solution atoms.
Sign-in/Register to access full text options 
Free) 
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 call
