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

Specific Features of the Atomic Structure of Ti50Ni25Cu25 Alloy Rapidly Quenched from Melt 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

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

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Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Inc. 2019
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/S1063774519060154
Publisher site
See Article on Publisher Site

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.

Journal

Crystallography ReportsSpringer Journals

Published: Jan 25, 2020

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