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Effect of the Polyvinyl Butyral Content on the Combustion Mode of the (Ti + C) + xNi Granular Mixture

  • COMBUSTION, EXPLOSION, AND SHOCK WAVES
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Abstract

In this paper, we study the effect of the polyvinyl butyral content (0–2.3%) on the combustion rate and phase composition of the (Ti + C) + xNi granular mixture, where x = 0, 5, 10, 15, and 20 wt %. At an increased content of the binder, for the first time, a convective combustion mode is discovered due to the ignition of the surface of granules with hot gaseous decomposition products of polyvinyl butyral. This mode is characterized by a higher rate of propagation of the reaction front than follows from the filtration combustion theory. The mechanism for the occurrence of nondecomposed polyvinyl butyral behind the ignition front is explained. According to the X-ray phase analysis data, the phase composition of combustion products does not change with a change in the polyvinyl butyral and nickel content in the mixture and includes only two phases: TiC and Ni. It is shown that when scaling the process of obtaining composite powders from a granular charge (Ti + C) + xNi, it is necessary to ensure the implementation of the conductive combustion mode.

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Funding

This study was supported by the Russian Foundation for Basic Research, project no. 19-33-90114, Postgraduates.

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Authors and Affiliations

  1. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    B. S. Seplyarskii, N. I. Abzalov, R. A. Kochetkov & T. G. Lisina

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  1. B. S. Seplyarskii
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  2. N. I. Abzalov
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  3. R. A. Kochetkov
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  4. T. G. Lisina
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Correspondence to B. S. Seplyarskii.

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Translated by A. Ivanov

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Seplyarskii, B.S., Abzalov, N.I., Kochetkov, R.A. et al. Effect of the Polyvinyl Butyral Content on the Combustion Mode of the (Ti + C) + xNi Granular Mixture. Russ. J. Phys. Chem. B 15, 242–249 (2021). https://doi.org/10.1134/S199079312102010X

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  • DOI: https://doi.org/10.1134/S199079312102010X

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