Abstract
In this work, the thermal studies of ultrafine and nanocrystalline core–shell structures of Ti(Mo)C and Ti(Mo)C-Co formed in the process of plasma chemical synthesis according to the plasma condensation scheme in a low-temperature nitrogen plasma were performed. The oxidation processes of all phase components in the core–shell structures, determined during the high-resolution transmission electron microscopy studies, are presented as experimental results. The composition of nanocompositions before and after oxidation was recorded by X-ray methods. This allowed us to determine the sequence of interaction of the phase components of the core–shell structures with oxygen present in cylinders with argon, including carbon oxidation. In addition to the high-resolution transmission electron microscopy methods, the presence of carbon on the surface of particles was also confirmed by Raman spectroscopy. The use of these analysis techniques in combination with the results of derivatography and thermogravimetry made it possible to formulate the oxidation mechanisms of the core–shell structures of Ti(Mo)C and Ti(Mo)C-Co.
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