GAS-PHASE DEPOSITION OF COMPLEX HIGH-MELTING COATINGS ON CARBON FIBER MATERIAL
V. V. Lozanov1, N. I. Baklanova1, N. B. Morozova2
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: осаждение из газовой фазы, карбид гафния, иридий, покрытия, углеродный волокнистый материал, vapor deposition, hafnium carbide, iridium, coatings, carbon fiber material
Abstract
The possibility of modifying carbon materials by RCVD and MOCVD of complex high-melting coatings consisting of the inner hafnium carbide layer and the outer iridium layer is studied. The morphological features, microstructure, and phase composition of the carbide and complex HfC-Ir coating on a carbon material are examined by scanning electron microscopy and powder X-ray diffraction analysis. The HfC coating is uniform, continuous, repeating the geometry of a carbon substrate. A scheme of chemical reactions describing the processes of hafnium transfer on carbon in the form of gaseous hafnium fluorides with a lower valence is proposed. The iridium coating consists of slightly elongated crystallites and has a good adhesion to the carbide layer.
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