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Special Features Of Stabilization Of The Growth Process In Plasma-arc Growth Of Single Crystals Of Refractory Compounds From SHS Products

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Refractories and Industrial Ceramics Aims and scope

Abstract

Problems of the stability of the growth process in growing single crystals of refractory compounds (carbides and bondes of transition metals) by the method of plasma-arc remelting are considered. The main reasons behind the loss of stability of the spatial configuration of the melt (a shift of the anode lock-on of the arc from the center of the molten pool, disturbance of the symmetry of the plasma jet, superheating of the melt) are considered. The effect of cyclic perturbations in the crystallization system that appear upon replenishment on the fluctuation of the energy characteristics of the arc, the temperature of the melt, and the displacements of the crystallization surface is described. It is established that the crystallization rate and the process of coarsening of the crystallites in the formation of a columnar structure in the ingot depend on the frequency of feeding new portions and on their mass.

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References

  1. G. S. Burkhanov, V. M. Shishin, V. A. Kuz’mishchev, et al., in:Plasma Growth of Refractory Single Crystals [in Russian], Metallurgiya, Moscow (1981).

    Google Scholar 

  2. M. A. Ponomarev,Growing Single Crystals of Refractory Compounds from SHS Products by the Method of Plasma-Arc Remelting, Author’s Abstract of Candidate’s Thesis [in Russian], Chemogolovka (1996).

  3. M. A. Kuzenkova,“Structure, properties, and fields of application of powder refractory compounds obtained by various methods,”Probl. Tekhnol. Goreniya,11,47–50 (1981).

    Google Scholar 

  4. M. A. Ponomarev, A. S. Steinberg, and S. N. Sclyarov,“The production of single crystal from SHS TiB2,” in:Proc. 1st US-Japanese Workshop on Combustion Synthesis, Japan, Tokyo (1990), pp. 97–99.

  5. V. A. Dement’ev, V. V. Sdobyrev, M. A. Ponomarev, et al., “Plasma growth of single crystals of TiB2, ZrB2, NbB2,” in:High-Purity and Single-Crystal Materials [in Russian], Nauka, Moscow (1987), pp. 71–74.

    Google Scholar 

  6. A. S. Shteinberg, M. A. Ponomarev, V. A. Raduchev, et al., “Growth of single crystals of refractory SHS products,”Int. J. SHS,4(2), 149–157(1995).

    CAS  Google Scholar 

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Authors and Affiliations

  1. Institute of Structural Macrokinetics and Problems of Materials Science of the Russian Academy of Sciences, Moscow, Russia

    M. A. Ponomarev & Yu. A. Sapronov

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  1. M. A. Ponomarev
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  2. Yu. A. Sapronov
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Ponomarev, M.A., Sapronov, Y.A. Special Features Of Stabilization Of The Growth Process In Plasma-arc Growth Of Single Crystals Of Refractory Compounds From SHS Products. Refract Ind Ceram 40, 239–243 (1999). https://doi.org/10.1007/BF02762292

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  • DOI: https://doi.org/10.1007/BF02762292

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