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Specific Features of the Atomic Structure of Ti50Ni25Cu25 Alloy Rapidly Quenched from Melt

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Abstract

A complex study of the structure of Ti50Ni25Cu25 alloy obtained in the initial amorphous state by rapid quenching (melt spinning) have been performed for the first time. The investigations are carried out by methods of neutron diffraction, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and electron microdiffraction. It is found that the topological and composition short-range atomic order, corresponding to three superstructure types (B2, L21, and L12), is formed within localized nanodomains (up to 1 nm) in amorphous Ti50Ni25Cu25 alloy upon solidification. It is also demonstrated for the first time that the alloy has an amorphous–crystal structure, which contains (along with individual microspherulites that underwent thermoelastic martensitic transformation B2 ↔ B19) nanocrystalline ensembles with the B2, L21, or L12 structure up to 10 nm in size, which are localized in the amorphous matrix.

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ACKNOWLEDGMENTS

Electron microscopy studies were performed using equipment of the Collaborative Access Center of the Institute of Metal Physics (Ural Branch, Russian Academy of Sciences).

Funding

This study was performed within government contract no. AAAA-A18-118020190116-6 (“Structure”) and the Joint Laboratory of the Ural State University and the Mikheev Institute of Metal Physics (Ural Branch, Russian Academy of Sciences).

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Authors and Affiliations

  1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620108, Yekaterinburg, Russia

    V. G. Pushin, A. V. Pushin & N. N. Kuranova

  2. Ural State University, 620002, Yekaterinburg, Russia

    V. G. Pushin, A. V. Pushin & N. N. Kuranova

Authors
  1. V. G. Pushin
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  2. A. V. Pushin
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  3. N. N. Kuranova
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Correspondence to V. G. Pushin.

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Translated by Yu. Sin’kov

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Pushin, V.G., Pushin, A.V. & Kuranova, N.N. Specific Features of the Atomic Structure of Ti50Ni25Cu25 Alloy Rapidly Quenched from Melt. Crystallogr. Rep. 65, 12–17 (2020). https://doi.org/10.1134/S1063774519060154

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  • DOI: https://doi.org/10.1134/S1063774519060154

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