Study on In-situ NbC Ceramic Reinforced Iron Matrix Composites
Author of the article:WEI Junzhe;BAI Haiqiang;XU Yunhua
Author's Workplace：School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
Key Words：in-situ reaction iron matrix composites NbC/Fe ceramic layer microhardness
Abstract：
NbC reinforced iron matrix composite was prepared by in-situ reaction of niobium atoms supplied by niobium wire and carbon atoms supplied by graphite in gray cast iron. XRD, SEM, TEM and other detection methods were used to analyze the phase composition and structure of the composites, and the hardness, micro-indentation morphology and indentation crack of the composites were analyzed by means of microhardness tester. The results show that NbC reinforced iron matrix composites were successfully prepared by in-situ reaction. The main phase composition of the composites isα-Fe, Nb, NbC, G. The thickness of NbC/Fe ceramic layer is about 242 ±3 microns, which shows good metallurgical bonding between NbC/Fe ceramic layer, Nb wire and iron matrix. The morphology of NbC ceramic particles is a standard cube, and the microhardness of NbC/Fe ceramic layer is 3~4 times that of iron matrix.
