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10.3390/met11121887
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Article

Phase Transitions in the Co–Al–Nb–Mo System

by
Denis Davydov
1,2,
Nataliya Kazantseva
1,*,
Nikolai Popov
2,
Nina Vinogradova
1 and
Igor Ezhov
1
1
Institute of Physics of Metals, Ural Branch of Russian Academy of Sciences, 620218 Ekaterinburg, Russia
2
Institute of New Materials and Technologies, Ural Federal University, 620002 Ekaterinburg, Russia
*
Author to whom correspondence should be addressed.
Metals 2021, 11(12), 1887; https://doi.org/10.3390/met11121887
Submission received: 26 October 2021 / Revised: 11 November 2021 / Accepted: 19 November 2021 / Published: 23 November 2021
(This article belongs to the Section Metal Casting, Forming and Heat Treatment)
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Abstract

Phase transitions in the Co-rich part of the Co–Al–Nb–Mo phase diagram are studied by energy dispersive spectroscopy (EDS), X-ray analysis, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC) measurements. The obtained results were compared with the results for alloys of the binary Co–Al and ternary Co–Al–Nb, and Co–Al–Mo systems. Formation of the intermetallic phase with the L12 structure was found in a range of alloys with 10 at.% Al, 2–9 at.% Nb, and 3–7 at.% Mo. Intermetallic compound Co2Nb, Laves phase with the different chemical composition and crystal structure (C14 and C36) was detected in the Co–Al–Nb and Co–Al–Nb–Mo samples after vacuum solution treating at 1250 °C for 30 h.
Keywords: heat resistant superalloys; phase transitions; Co–Al–Nb–Mo; L12 structure heat resistant superalloys; phase transitions; Co–Al–Nb–Mo; L12 structure

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MDPI and ACS Style

Davydov, D.; Kazantseva, N.; Popov, N.; Vinogradova, N.; Ezhov, I. Phase Transitions in the Co–Al–Nb–Mo System. Metals 2021, 11, 1887. https://doi.org/10.3390/met11121887

AMA Style

Davydov D, Kazantseva N, Popov N, Vinogradova N, Ezhov I. Phase Transitions in the Co–Al–Nb–Mo System. Metals. 2021; 11(12):1887. https://doi.org/10.3390/met11121887

Chicago/Turabian Style

Davydov, Denis, Nataliya Kazantseva, Nikolai Popov, Nina Vinogradova, and Igor Ezhov. 2021. "Phase Transitions in the Co–Al–Nb–Mo System" Metals 11, no. 12: 1887. https://doi.org/10.3390/met11121887

APA Style

Davydov, D., Kazantseva, N., Popov, N., Vinogradova, N., & Ezhov, I. (2021). Phase Transitions in the Co–Al–Nb–Mo System. Metals, 11(12), 1887. https://doi.org/10.3390/met11121887

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