The nanocrystals of carbon-coated iron and iron compounds produced in carbon arc method

The nanocrystals of carbon-coated iron and its compounds were produced by d . c. carbon are method using a composite anode of alpha-Fe or alpha-Fe2O3 a nd graphite. The investigations of the morphology, structures and Mossbauer spectra of carbon-coated iron and its compound nanocrystals were carried o ut. The formation of carbon-coated Fe nanocrystals was discussed. The resul ts show that the samples produced from alpha-Fe and graphite composite anod e contain alpha-Fe, Fe3C (cementite) and austenite nanocrystals, whereas th e samples produced form alpha-Fe2O3 and graphite composite anode contain al pha-Fe, Fe3C, austenite and gamma-Fe2O3 nanocrystals. The properties of nan ocrystal encapsulated in graphite are different from that of itself.