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A Composite Based on Niobium η-Carbide: Synthesis, Phase Composition and Properties

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Metal Science and Heat Treatment Aims and scope

Composites based on Nb3(Fe, Al)3 C η-carbide obtained by mechanical alloying are studied. Microstructural and quantitative phase analyses are performed. The phase composition, the density and the hardness are determined. It is shown that mechanical fusion of the elemental components in liquid hydrocarbon followed by annealing can be used to synthesize an Nb3(Fe, Al)3 C η-carbide phase. Spark plasma sintering is used to obtain a composite based on η-carbide (60 wt.%). The other phases are Nb5Al3Cx, Nb3Al, Nb, Nb2C and about 5 wt.% graphite nanoplatelets. The composite has a density of 5.11 ± 0.05 g/cm3, a porosity of about 20%, and a hardness of 1.4 ± 0.6 GPa and virtually does not wear under dry friction with hardened steel balls and balls from alloy VK6.

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Notes

  1. The authors are grateful to V. F. Lys (UDMFITS URO RAN) for making the tribological tests.

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The work has been performed within State Assignment No. BB 2021 121030100003-7 of the Ministry of Education and Science of the Russian Federation with the use of the equipment of the TSKP “Center for Physical and Physicochemical Methods of Analysis, Study of Properties and Surface Characteristics, Nanostructures, Materials and Articles” of the UDMFITS UrO RAN and of the TsKP the UrFU).

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Authors and Affiliations

  1. Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences, Izhevsk, Russia

    M. A. Eremina, S. F. Lomaeva & V. V. Tarasov

  2. Institute of New Materials and Technologies, Ural Federal University, Ekaterinburg, Russia

    S. L. Demakov

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  1. M. A. Eremina
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  2. S. F. Lomaeva
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  3. S. L. Demakov
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  4. V. V. Tarasov
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Correspondence to M. A. Eremina.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 48 – 54, January, 2023

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Eremina, M.A., Lomaeva, S.F., Demakov, S.L. et al. A Composite Based on Niobium η-Carbide: Synthesis, Phase Composition and Properties. Met Sci Heat Treat 65, 47–53 (2023). https://doi.org/10.1007/s11041-023-00890-6

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