Application of microwave discharge for the synthesis of TiB{sub 2} and BN nano- and microcrystals in a mixture of Ti-B powders in a nitrogen atmosphere

Journal Article · Tue Oct 15 00:00:00 EDT 2013 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X13100024· OSTI ID:22218649

Berezhetskaya, N. K.; Borzosekov, V. D. ^[1]; Iskhakova, L. D. ^[2]; Kolik, L. V.; Konchekov, E. M.; Letunov, A. A.; Malakhov, D. V. ^[1]; Milovich, F. O. ^[2]; Obraztsova, E. A.; Obraztsova, E. D.; Petrov, A. E.; Sarksyan, K. A.; Skvortsova, N. N.; Stepakhin, V. D.; Kharchev, N. K. ^[1]

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1. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
2. Russian Academy of Sciences, Fiber Optics Research Center (Russian Federation)

Synthesis of titanium diboride and boron nitride nano- and microcrystals by means of a pulsed microwave discharge in a mixture of Ti-B powders in a nitrogen atmosphere is considered. For this purpose, a new type of reactor with a free surface of the powder mixture was used. The reactor design permits free expansion of the reaction products into the reactor volume and their deposition on the reactor walls. Conditions for the synthesis of TiB{sub 2} and BN compounds were studied as functions of the energy input in the discharge, the powder component ratio, the rate of the nitrogen flow through the reactor, and the structure and phase composition of the compounds deposited on the reactor walls. The synthesis of boron nitride and titanium diboride in crystal structures is proven. An important role in the process of synthesis is played by the heating of the mixture due to the titanium diboride synthesis reaction, its behavior in the bulk of the reactor, and the titanium concentration in the powder mixture. It is also found that, as the number of discharges in the bulk of the reactor increases, a dust cloud forms. The luminescence of this cloud indicates that the initiated discharge proceeds not only on the powder surface and in the powder bulk, but also in the reactor volume.

• OSTI ID: 22218649
• Journal Information: Plasma Physics Reports, Vol. 39, Issue 10; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ATMOSPHERES
BORON NITRIDES
CRYSTAL STRUCTURE
CRYSTALS
HIGH-FREQUENCY DISCHARGES
LUMINESCENCE
MIXTURES
NITROGEN
POWDERS
PULSES
SYNTHESIS
TITANIUM
TITANIUM BORIDES