Abstract
The objective of this work is to study the graphitization of diamonds due to the presence of iron. Composites of Fe-15 wt.% diamonds were processed by means of conventional powder metallurgy with the parameters of cold pressing at 350 MPa and sintering at 1100°C/360 min. The oxidative behavior of diamonds was analyzed using thermal analysis. The influence of sintering was analyzed through microstructural investigation by means of scanning electron microscopy and energy-dispersive X-ray spectroscopy. The absorption bands of the C–C bonds of the graphite and diamond structures were analyzed using infrared spectroscopy. The results show the intensity of graphitization in the presence of Fe, and that the temperature utilized in the experiments was appropriate.
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