Peculiarities of the structure of a refractory eutectic alloy of the Nb – Si system, formed by the method of directed crystallization with liquid-metal coolant, have been studied. Characteristic zones of microstructure of the ingot obtained upon directed crystallization are considered, the alloy composition is analyzed, and volume fractions of phases in the Nb – Si composite are determined.
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Notes
Metallographic investigations were performed with participation of I. V. Iskhodzhanova and M. A. Lapteva.
XRD analysis was performed with participation of N. A. Kuz’-mina.
References
V. A. Skibin and V. I. Solonin (eds.), Science Contribution to the Creation of Aircraft Engines [in Russian], Mashinostroenie, Moscow (2000), Vols. 1 and 2, 750 p.
E. N. Kablov, N. V. Petrushin, I. L. Svetlov, and I. M. Demonis, “Refractory nickel cast alloys of the new generation,” Aviats. Mater. Tekhnol., Suppl. Issue, 36 – 52 (2012).
O. E. Osintsev, Metallography of Refractory Metals and Alloys [in Russian], Mashinostroenie, Moscow (2013), 155 p.
Yu. A. Kocherzhinskii, L. M. Yupko, and E. A. Shishkin, “Phase diagrams of Nb – Si system,” Izv. Akad. Nauk. SSSR, Met., No. 1, 206 – 211 (1980).
B. P. Bewlay,M. R. Jackson, J. A. Sutliffe, et al., “Solidification processing of high-temperature intermetallic eutectic-based alloys,” Mater. Sci. Eng. A, 192 – 193, 534 – 543 (1995).
B. P. Bewlay, M. R. Jackson, and H. A. Lipsitt, “The balance of mechanical and environmental properties of a multielement niobium – niobium silicide based in-situ composite,” Metall. Mater. Trans. A, 27(12), 3801 – 3808 (1996).
B. P. Bewlay, M. R. Jackson, and P. R. Subramanian, “Processing high-temperature refractory-metal silicide in-situ composites,” J. Metals, 32 – 36 (1999).
B. P. Bewlay,M. R. Jackson, J. C. Zhao, and P. R. Subramanian, “A review of very high-temperature Nb-silicide based composites,” Metall. Mater. Trans. A, 34(10), 2043 – 2052 (2003).
X. P. Guo, P. Guan, X. Ding, et al., “Unidirectional solidification of a Nbss /Nb5Si3 in-situ composite,” Mater. Sci. Forum, 475 – 479, 745 – 748 (2005).
E. N. Kablov (ed.), Cast Blades of Gas Turbine Engines: Alloys, Technologies, Coatings [in Russian], Nauka, Moscow (2006), 632 p.
A. I. Somov and M. A. Tikhonovskii, Eutectic Compositions [in Russian], Metallurgiya, Moscow (1975), 304 p.
W. Kurz and P. R. Sahm, Gerichtet erstarrte eutektische Werkstoffe [in German], Berlin (1980).
Yu. A. Bondarenko, E. N. Kablov, and V. A. Pankratov, “Peculiarities of fabricating small-size gas turbine blades from VKLS-20 type alloys,” Aviats. Prom-st’, No. 2, 9 – 10 (1993).
Yu. A. Bondarenko and E. N. Kablov, “Directed crystallization of refractory alloys with elevated temperature gradient,” Metalloved. Term. Obrab. Met., No. 7, 20 – 23 (2002).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 41 – 45, August, 2017.
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Bondarenko, Y.A., Echin, A.B., Kolodyazhnyi, M.Y. et al. Formation of the Structure of a Eutectic Alloy of the Nb – Si System During Directed Crystallization with Liquid-Metal Coolant. Met Sci Heat Treat 59, 513–517 (2017). https://doi.org/10.1007/s11041-017-0181-2
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DOI: https://doi.org/10.1007/s11041-017-0181-2