Application of EXELFS Spectroscopy to the Study of the Local Atomic Structure of Carbon-Containing Materials

摘要

The main aim of this work was to further develop the method of extended energy-loss fine structure (EXELFS) for the investigation of the structure of binary compounds containing light elements (C, O, S P, etc.). The local atomic structure in different carbon modifications such as highly oriented pyrolytic graphite and amorphous graphite prepared by milling in a planetary ball mill was studied in an HF-3000 FEG TEM transmission electron microscope equipped with an electron spectrometer for recording electron-energy-loss spectra. The advantage of the EXELFS method for the study of the local atomic structure of binary compounds containing light elements was demonstrated by the example of cementite Fe_3C in a carbon steel U15.