Fabrication of  Iron Aluminide Coatings  (Fe3Al and FeAl3) on Steel  Substrate by Self-Propagating High  Temperature Synthesis  (SHS)  Process

S. Mohammadkhani; N. Bondar; J. Vahdati-Khaki; M. Haddad-Sabzevar

doi:10.6000/2369-3355.2017.04.02.2

Authors

S. Mohammadkhani Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 91775-1111, Iran
N. Bondar Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 91775-1111, Iran
J. Vahdati-Khaki Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 91775-1111, Iran
M. Haddad-Sabzevar Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 91775- 1111, Iran

DOI:

https://doi.org/10.6000/2369-3355.2017.04.02.2

Keywords:

Iron Aluminide Coating, Fe3Al, FeAl3, Low carbon steel, Self-propagating high-temperature synthesis (SHS), SEM, XRD, Wear test

Abstract

Iron aluminides (Fe₃Al and FeAl₃) coatings were fabricated on a steel substrate by self-propagating high temperature synthesis (SHS) method. Raw materials, Fe and Al powders, were mixed at two different stoichiometry ratios (3:1 and 1:3). The mixtures and the substrate were placed in a furnace at 950 Â°C to ignite the SHS process. Coating phases were investigated using X-ray diffraction (XRD) and Energy Dispersive Spectroscopy (EDS). The microstructure of the coatings was analyzed with optical microscopy (OM) and scanning electron microscopy (SEM). The results confirmed that it is possible to produce Fe₃Al and FeAl₃ coatings on steel substrate using SHS method. In addition, the results show that the coatings were composed of two different phases and their microstructures were non-porous and dense. Wear resistance of the coatings were higher than that of the substrate.

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