Boron carbide is known as a hard material; it possesses a unique complex of physical-mechanical properties and has diverse applications in industries. An expansion of its field of uses stems from the creation of boron carbide matrix nanocomposite materials. In view of this perspective, an effective liquid-charge synthesizing method for their components in nanopowder form has been proposed. This paper provides a focused review on advanced boron carbide matrix ceramic and metal-ceramic nanocomposites recently obtained by the authors using this method. Particular attention is paid to the characterization of boron carbide nanocomposites, including some ceramic borides, metallic alloys and also other metal-ceramic composites.
Impact of the process of modification on graphite structure at the application of fluorine-containing oligomer-FDS (chloroperfluorododecylfluoro sulfate) has been studied. It was shown that during this process graphite structure does not change. Only particles of FDS are destructed into monolayers, which are spread in graphite intercrystalline voids. At the mechanical impact it protects graphite from destruction and correspondingly, improveing some of its tribotechnical characteristics.
In order to create medicinal preparations of some pharmacological action we deemed topical to develop an convenient preparative method for the synthesis of new isomeric qunoxalines.By condensation of 4-chlorophenylenediamine (1) with diphenylethanedione, 6-chloro-2,3diphenylquinoxaline (2) was synthesized. Quinolinhydrazine (3) was obtained by interaction of the mentioned chlorine products with hydrazine hydrate, and the corresponding 2,3-diphenyl-6quinoxalinehydrazone was obtained by the action of ethylester of pyruvic acid on the latter.Composition and structure of synthesized compounds is determined by element analysis and physical methods of investigation.
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