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Characteristic properties of combustion and structure formation in the Ti-Ta-C system

  • Self-Propagating High-Temperature Synthesis
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Russian Journal of Non-Ferrous Metals Aims and scope Submit manuscript

Abstract

Macrokinetic characteristics of the combustion of mixtures in the (100% − X)(Ti + 0.5C) + X(Ta + C) system with a variable mixing parameter X and initial temperature T 0 of charge heating are considered. For compositions with X = 10 and 30%, an abrupt increase in the velocity U c and temperature T c of combustion as a result of passing two parallel chemical reactions of titanium and tantalum carbide formation is established. The U c (T 0) and T c (T 0) dependencies are linear for the mixture with X = 50%. By hardening the combustion wave, it is revealed that the primary structure formation in the combustion region starts from the selection of submicron grains of nonstoichiometric titanium carbide from the supersaturated titanium melt. In the investigated range of parameter X, synthetic products are single-phase and represent titanium-tantalum carbide. An increase in X results in a decrease in the size and microhardness of (Ti, Ta) C grains and a reduction of the relative density of compact synthetic products. The kinetics of high-temperature oxidation of alloys on the basis of carbide (Ti, Ta) C is studied. Ceramics produced at X = 10% are most heat-resistant.

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Authors and Affiliations

  1. Scientific and Educational Center of Self-Propagating High-Temperature Synthesis, Moscow State Institute of Steel and Alloys (State Technological University) and Institute of Structural Macrokinetics and Material Sciences, Russian Academy of Sciences (NUTs SHS MISiS-ISMAN), Leninskii pr. 4, Moscow, 119049, Russia

    E. A. Levashov, V. V. Kurbatkina & E. I. Patsera

  2. Institute of Structural Macrokinetics and Material Sciences, Russian Academy of Sciences, ul. Institutskaya 8, Chernogolovka, Moscow oblast, 142432, Russia

    A. S. Rogachev, N. A. Kochetov & N. V. Sachkova

Authors
  1. E. A. Levashov
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  2. V. V. Kurbatkina
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  3. A. S. Rogachev
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  4. N. A. Kochetov
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  5. E. I. Patsera
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  6. N. V. Sachkova
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Correspondence to E. A. Levashov.

Additional information

Original Russian Text © E.A. Levashov, V.V. Kurbatkina, A.S. Rogachev, N.A. Kochetov, E.I. Patsera, N.V. Sachkova, 2008, published in Izvestiya VUZ. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya, 2008, No. 5, pp. 25–35.

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Levashov, E.A., Kurbatkina, V.V., Rogachev, A.S. et al. Characteristic properties of combustion and structure formation in the Ti-Ta-C system. Russ. J. Non-ferrous Metals 49, 404–413 (2008). https://doi.org/10.3103/S1067821208050179

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