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Russian Journal of Non-Ferrous Metals

, Volume 60, Issue 2, pp 169–172 | Cite as

Peculiarities of the Synthesis of High-Temperature TaSi2–SiC Ceramics Reinforced in situ by Discrete Silicon Carbide Nanofibers

  • S. VorotiloEmail author
  • E. D. PolosovaEmail author
  • E. A. LevashovEmail author
PHYSICAL METALLURGY AND HEAT TREATMENT
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Abstract

The possibility of increasing the mechanical properties of the ceramic material of the TaSi2–SiC system by reinforcing it with silicon carbide nanofibers forming in situ in the combustion wave of the SHS system is investigated. To fabricate nanofibers, as well as to increase the exothermicity of reaction mixtures, an energetic polytetrafluoroethylene (PTFE) additive C2F4 was applied. The 70%TaSi2 + 30%SiC ceramic, in which silicon carbide is situated in two types of morphology—in the form of rounded grains and discrete nanofibers—was fabricated with the help of self-propagating high-temperature synthesis when using the mechanical activation of initial reaction mixtures. Reinforced ceramic samples sintered using hot pressing have a relative density up to 98%, hardness of 19.0–19.2 GPa, and crack resistance of 7.5–7.8 MPa m1/2 (which noticeably exceeds the crack resistance of the ceramics of the close composition formed without the PTFE additive).

Keywords:

TaSi2 SiC nanofibers high-temperature ceramics SHS 

Notes

ACKNOWLEDGMENTS

This study was supported by the Russian Scientific Foundation, project no. 14-19-00273-P.

REFERENCES

  1. 1.
    Properties and Applications of Silicon Carbide, Rosario Gerhardt, Ed., IntechOpen, 2011.  https://doi.org/10.5772/615.
  2. 2.
    Moskovskikh, D.O., Lin, Y-C., Rogachev, A.S., McGinn, P.J., and Mukasyan, A.S., Spark plasma sintering of SiC powders produced by different combustion synthesis routes, J. Eur. Ceram. Soc., 2015, vol. 35, no. 2, pp. 477–486.CrossRefGoogle Scholar
  3. 3.
    Vorotilo, S., Potanin, A.Y., Iatsyuk, I.V., and Levashov, E.A., SHS of silicon-based ceramics for the high-temperature applications, Adv. Eng. Mater., 2018, vol. 20, no. 8, p. 1800200.CrossRefGoogle Scholar
  4. 4.
    Chen, P., Jing, S., Chu, Y., and Rao, P., Improved fracture toughness of CNTs/SiC composites by HF treatment, J. Alloys and Compd., 2018, vol. 730, pp. 42–46.CrossRefGoogle Scholar
  5. 5.
    Li, Q., Zhang, Y., Gong, H., Sun, H., Li, W., Ma, L., and Zhang, Y., Enhanced fracture toughness of pressureless-sintered SiC ceramics by addition of graphene, J. Mater. Sci. Technol., 2016, vol. 32, no. 7, pp. 633–638.CrossRefGoogle Scholar
  6. 6.
    Vorotilo, S., Levashov, E.A., Kurbatkina, V.V., Kovalev, D.Yu., and Kochetov, N.A., Self-propagating high-temperature synthesis of nanocomposite ceramics TaSi2–SiC with hierarchical structure and superior properties, J. Eur. Ceram. Soc., 2018, vol. 38, no. 2, pp. 433–443.CrossRefGoogle Scholar
  7. 7.
    Du, S.X., Zhang, K., Wen, M., Ren, P., Meng, Q.N., Zhang, Y.D., and Zheng, W.T., Crystallization of SiC and its effects on microstructure, hardness and toughness in TaC/SiC multilayer films, Ceram. Int., 2018, vol. 44, pp. 613–621.CrossRefGoogle Scholar
  8. 8.
    Luo, H., Chen, W., Zhou, W., Long, L., Deng, L., Xiao, P., and Li, Y., Carbon fiber/Si3N4 composites with SiC nanofiber interphase for enhanced microwave absorption properties, Ceram. Int., 2017, vol. 43, no. 15, pp. 12328–12332.CrossRefGoogle Scholar
  9. 9.
    Ayral, R.M., Rouessac, F., and Massoni, N., Combustion synthesis of silicon carbide assisted by a magnesium plus polytetrafluoroethylene mixture, Mater. Res. Bull., 2009, vol. 44, no. 11, pp. 2134–2138.CrossRefGoogle Scholar
  10. 10.
    Nersisyan, G.A., Nikogosov, V.N., Kharatyan, S.L., and Merzhanov, A.G., Chemical transformation mechanism and combustion regimes in the system silicon-carbonfluoroplast, Combust. Explos. Shock Waves, 1991, vol. 27, no. 6, pp. 720–724.CrossRefGoogle Scholar
  11. 11.
    Anstis, G.R., Chantikul, P., Lawn, B.R., and Marshal, D.B., A critical evaluation of indentation techniques for measuring fracture toughness: I. Direct crack measurements, J. Amer. Ceram. Soc., 1981, vol. 64, pp. 533–538.CrossRefGoogle Scholar
  12. 12.
    Liu, G., Chen, K., and Li, J., Combustion synthesis: An effective tool for preparing inorganic materials, Scripta Mater., 2018, vol. 157, pp. 167–173.CrossRefGoogle Scholar
  13. 13.
    Yang, Z., Li, Z., Ning, T., Zhang, M., Yan, Y., Zhang, D., and Cao, G., Microwave dielectric properties of B and N co-doped nanopowders prepared by combustion synthesis, J. Alloys Compd., 2019, vol. 777, pp. 1039–1043.  https://doi.org/10.1016/j.jallcom.2018.11.067.CrossRefGoogle Scholar
  14. 14.
    Dąbrowska, A., Bzymek, A., and Huczko, A., In situ diagnostics of the SiC nanostructures growth process, J. Crystal Growth, 2014, vol. 401, pp. 376–380.CrossRefGoogle Scholar
  15. 15.
    Chu, A., Zhang, D., Guo, S., and Qu, X., Polyacrylamide-assisted combustioncarbothermal synthesis of well-distributed SiC nanowires, Ceram. Int., 2015, vol. 41, no. 10, Pt. B, pp. 14585–14591.Google Scholar
  16. 16.
    Zheng, C.-S., Yan, Q.-Z., and Xia, M., Combustion synthesis of SiC/Si3N4–NW composite powders: The influence of catalysts and gases, Ceram. Int., 2012, vol. 38, no. 6, pp. 4549–4554.CrossRefGoogle Scholar
  17. 17.
    Potanin, A.Yu., Zvyagintseva, N.V., Pogozhev, Yu.S., Levashov, E.A., Rupasov, S.I., Shtansky, D.V., Kochetov, N.A., and Kovalev, D.Yu., Silicon carbide ceramics SHSproduced from mechanoactivated Si–C–B mixtures, Int. J. SHS, 2015, vol. 24, no. 3, pp. 119–127.Google Scholar
  18. 18.
    Iatsyuk, I.V., Potanin, A.Yu, Rupasov, S.I., and Levashov, E.A., Kinetics and high-temperature oxidation mechanism of ceramic materials in the ZrB2–SiC–MoSi2 system, Russ. J. Non-Ferrous Met., 2018, vol. 59, no. 1, pp. 76–81.CrossRefGoogle Scholar

Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  1. 1.National University of Science and Technology “MISiS”MoscowRussia

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