Characterization of Phases Formed in the Iron Carbide Process by X-Ray Diffraction, Mossbauer, X-Ray Photoelectron Spectroscopy, and Raman Spectroscopy Analyses

摘要: Iron carbide was prepared by iron ore reduction and cementation using Ar-H2-CH4 gas mixture with without sulfur. Phases formed in the reduction/cementation process were examined X-ray diffraction (XRD), Mossbauer, Raman spectroscopy. The sample surface also analyzed photoelectron spectroscopy (XPS). XRD Mossbauer analyses showed that oxide first reduced to metallic iron, then, carburized cementite. Addition of a small amount H2S reaction retarded cementite formation but made more stable. XPS analysis samples converted sulfurcontaining consisted mainly Fe3C graphitic carbon. spectra produced G D bands, which are characteristic for carbon-carbon bonds. intensity ratio G/D bands depended on sulfur content reducing/carburizing gas.