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Powder Metallurgy and Metal Ceramics

, Volume 45, Issue 5–6, pp 279–282 | Cite as

Adsorption-chemical activity of finely-dispersed amorphous powders of brown and black boron used in synthesizing metal borides

  • V. S. Zenkov
Article

Abstract

Kinetic features of adsorption-desorption processes for a nitrogen and oxygen mixture of gases, nitrogen and water vapor at the surface of finely-dispersed amorphous powders of brown and black boron used to synthesize metal borides are studied. The different adsorption-chemical activity of amorphous brown and black boron powders towards the main components of an air atmosphere is determined. It is shown that the original boron, apart from hard impurity compounds, may carry at the surface gaseous constituents with a capacity to change the physicochemical parameters of the system in the reaction zone, and to affect the phase composition and quality of the product obtained.

Keywords

adsorption amorphous powder black boron brown boron adsorption-chemical activity titanium boride nitrogen, oxygen 

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References

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    V. A. Ryabin, M. A. Ostroumov, and T. F. Svit, Thermodynamic Properties of Substances [in Russian], Khimiya, Leningrad (1977).Google Scholar
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    G. V. Samsonov, L. Ya. Markovskii, A. F. Zhigach, and M. G. Valyashko, Boron, its Compounds and Alloys [in Russian], Izd. Akad. Nauk. UkrSSR, Kiev (1960).Google Scholar
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    G. Remy, Course in Inorganic Chemistry, Vol. 1 [Russian translation], Mir, Moscow (1972).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • V. S. Zenkov
    • 1
  1. 1.Institute for Problems of Materials ScienceNational Academy of Sciences of UkraineKiev

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