Abstract
The regularities of synthesis by the SHS metallurgy method of cast materials in the Mo-W-Si system are studied. The experiments were carried out in SHS reactors with a volume of 3, 20 and 30 L under the pressure of an inert gas (argon) P = 5 MPa. In the experiments, high-calorie mixtures of molybdenum (6) and tungsten (6) oxides with aluminum and silicon were used. Thermodynamic calculation of combustion parameters of the initial systems according to the Thermo program showed that they have high adiabatic combustion temperatures exceeding the melting points of the initial reagents and final products of synthesis. Studies have shown a strong effect of the ratio of the initial reagents on the regularities of synthesis. Cast (ingots) single-phase disilicides of molybdenum (MoSi2) and tungsten (WSi2), as well as their solid solutions MoSi2–WSi2, are obtained with any given ratio between them. Their microstructure and elemental and phase composition were investigated. Optimal modes of mechanical conversion of the obtained ingots of the target products into the powders of the required fractions are developed. The influence of the composition of composites on the strength and oxidation of sintered samples in air at different temperatures was studied. It was shown that sintered composites from MoSi2–WSi2 solutions have higher strength and are less susceptible to oxidation compared to ceramics obtained by solid-phase sintering from powders of individual MoSi2 and WSi2.
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Samsonov, G.V., Dvorina, L.A., and Rud’, B.M., Silitsidy (Silicides), Moscow: Metallurgiya, 1979.
Shchedrin, K.P. and Gakman, E.L., Zharostoikie materialy (Heat-Resistant Materials), Moscow: Mashino-stroenie, 1965.
Voitovich, R.F. and Pugach, E.A., Okislenie silitsidov metallov IV–VI grupp (Oxidation of Silicides of Metals of Groups IV–VI), Kiev: Naukova Dumka, 1977.
Titov, D.D., Kargin, Yu.F., Lysenkov, A.S., Popova, N.A., and Gorshkov, V.A., Influence of WSi2 content and addition of magnesium alumosilicates on oxidation and strength properties of MoSi2–WSi2 composites, Inorg. Mater.: Appl. Res., 2013, vol. 4, no. 1, pp. 66–70.
Huang, Q., Ma, C., Zhao, X., and Xu, H., Phase equilibria in Nb–Si–Mo ternary alloys at 1273 and 2073 K, Chin. J. Aeronaut., 2008, vol. 21, pp. 448–454.
Titov, D.D., Lysenkov, A.S., Kargin, Yu.F., Gorshkov, V.A., Goldberg, M.A., and Petrakova, N.V., Low-temperature oxidation of MoSi2–Si3N4 composites, Inorg. Mater.: Appl. Res., 2016, vol. 7, no. 4, pp. 624–629.
Matsuura, K., Ohmi, T., Kudoh, M., and Hasegawa, T., Synthesis of MoSi2–TiSi2 pseudobinary alloys by reactive sintering, Metall. Mater. Trans. A, 1999, vol. 31, no. 3, pp. 747–753.
Merzhanov, A.G. and Borovinskaya, I.P., Self-propagating high-temperature synthesis of refractory inorganic compounds, Dokl. Akad. Nauk SSSR, 1972, vol. 204, no. 2, pp. 366–369.
Merzhanov, A.G., The chemistry of self-propagating high-temperature synthesis, J. Mater. Chem., 2004, vol. 14, no. 12, pp. 1779–1786.
Merzhanov, A.G., SHS on the pathway to industrialization, Int. J. Self-Propag. High-Temp. Synth., 2001, vol. 10, no. 2, pp. 237–256.
Levashov, E.A., Mukasyan, A.S., Rogachev, A.S., and Shtansky, D.V., Self-propagating high-temperature synthesis of advanced materials and coatings, Int. Mater. Rev., 2017, vol. 62, no. 4, pp. 203–239.
Levashov, E.A., Rogachev, A.S., Kurbatkina, V.V., Maksimov, Yu.M., and Yukhvid, V.I., Perspektivnye materially i tekhnologii samorasprostranyayushchegosya vysokotemperaturnogo sinteza (Advanced Materials and Technologies of Self-Propagating High-Temperature Synthesis), Moscow: Mosk. Inst. Stali Splavov, 2011.
Yukhvid, V.I., High-temperature liquid-phase SHS processes: new trends and task objectives, Izv. Vyssh. Uchebn. Zaved., Tsvetn. Metall., 2006, no. 5, pp. 62–78.
Gorshkov, V.A., Yukhvid, V.I., Andrianov, N.T., and Lukin, E.S., High-temperature liquid-phase synthesis and sintering of powders MoSi2, Inorg. Mater., 2009, vol. 45, no. 5, pp. 1–5.
Yukhvid, V.I., Gorshkov, V.A., Miloserdov, P. A., Skachkova, N.V., Alymov, M.I., Nolze, G., and Epishin, A., Synthesis of molybdenum and niobium mono- and binary silicides by the method of SHS metallurgy, Adv. Eng. Mater., 2016, vol. 18, no. 11, pp. 1930–1935.
Gorshkov, V.A., Yukhvid, V.I., Miloserdov, P.A., Sachkova, N.V., and Kovalev, D.Yu., Cast silicides of molybdenum, tungsten, and niobium by combustion synthesis, Int. J. Self-Propag. High-Temp. Synth., 2011, vol. 20, no. 2, pp. 100–106.
Shiryaev, A.A., Thermodynamics of SHS processes: an advanced approach, Int. J. Self-Propag. High-Temp. Synth., 1995, vol. 4, no. 4, pp. 351–362.
ACKNOWLEDGMENTS
Equipment of the Distributed Center of Collective Use of the Merzhanov Institute of Structural Macrokinetics and Materials Science was used.
This work was supported within the scope of the state assignment of the Merzhanov Institute of Structural Macrokinetics and Materials Science, topic no. 46.1, and the state assignment of the Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences no. 007-00129-18-00.
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Gorshkov, V.A., Miloserdov, P.A., Titov, D.D. et al. SHS Metallurgy of Binary Silicides (MoW)Si2 for Sintering Composite Materials. Inorg. Mater. Appl. Res. 10, 473–479 (2019). https://doi.org/10.1134/S2075113319020138
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DOI: https://doi.org/10.1134/S2075113319020138