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A V, L., K V, P., D O, N., V M, C., & L A, S. (2019). Phase Composition of Mo-Si-V Hypoeutectic Alloys. KnE Materials Science, 5(1), 108–117. https://doi.org/10.18502/kms.v5i1.3957

https://doi.org/10.18502/kms.v5i1.3957

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authors

  • Larionov A V
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  • Pikulin K V
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  • Novikov D O
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  • Chumarev V M
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  • Smirnov L A
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Published Date

  • Mar 17, 2019

Phase Composition of Mo-Si-V Hypoeutectic Alloys

KnE Materials Science / Theoretical and practical conference with international participation and School for young scientists / Pages 108–117

Abstract

Thermodynamic modeling (TDM) of phase formation was performed with vanadium doping of the hypoeutectic Mo-Si alloy. It was found that the thermochemical properties of vanadium silicides (presented in the HSC Chemistry 6.12 database), when modeling Mo-Si(14.5-12.2)-V(5.0-20.0) alloys, lead to inadequate results regarding Mo-Si-V diagram state indicators. The simulation results agree satisfactorily with the Mo-Si-V diagram with the following values of ΔH0 298: for V3Si = - 180.4 kJ / mol, for V5Si3 = -433.6 kJ / mol, for VSi2 = -124.5 kJ / mol. According to the results of TDM and X-ray phase analysis (XRD) of the obtained alloys, it was found that vanadium in Mo-Si-V ternary alloys can be found both in the form of silicides, (Mo,V)3Si, and in the composition of the solid solution (Mo,V)

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