Abstract
Mechanical alloying of iron and graphite powders was performed in composition range Fe 1 − x C x ( x = 0.17−0.90) by the use of a conventional ball mill. The structures of mechanically alloyed samples were examined by X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy, 57Fe Mössbauer spectroscopy and differential scanning calorimetry. The results from X-ray, TEM and Mössbauer measurements suggested the partial formation of amorphous phase. Amorphization was notable on the sample ball milled for about 200 h. After subsequent milling, formation of metastable carbides Fe 3C for the powders with x = 0.17−0.25 and Fe 7C 3 for x = 0.29−0.70 was detected. Formation of fine paramagnetic particles was detected by Mössbauer spectroscopy for the powders having carbon content x = 0.80−0.90.
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