The kinetics of L10 superstructure formation in the Cu–56Au alloy (at. %): resistometric study
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
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The kinetics of L10 superstructure formation in the Cu–56Au alloy (at. %): resistometric study
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| Автор |
Podgorbunskaya, P. O.
Zgibnev, D. A. Gavrilova, A. A. Novikova, O. S. Volkov, A. Yu. |
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| Тематика |
ATOMIC ORDERING
CU-AU ALLOYS ORDER DEGREE EVALUATION RESISTOMETRY SUPERSTRUCTURAL X-RAY REFLECTIONS СU–56 AT. % AU |
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| Описание |
Due to the improved strength properties compared to the equiatomic Cu–50 at. % Au alloy, nonstoichiometric Cu–56 at. % Au alloy can be used both in dentistry and as a corrosion-resistant conductor of weak electrical signals in tool engineering. The work studies the kinetics of the disorder→order phase transformation in the Cu–56Au alloy, during which the disordered fcc lattice (A1-phase) is rearranged into an atomically ordered one with the L10 superstructure. The initial disordered state of the alloy was obtained in two ways: applying plastic deformation by 90 % or quenching at a temperature of above 600 °C (i. e., from the region of the A1-phase existence). To form the L10 superstructure, annealing was carried out at temperatures of 200, 225, and 250 °C. The annealing duration ranged from 1 h to 2 months. Resistometry was chosen as the main technique to study the kinetics of the disorder→order transformation. The temperature dependences of the electrical resistivity of the alloy in various structural states are obtained. The authors constructed the graphs of the electrical resistance dependence on the annealing time logarithm, based on which, the rate of the new phase formation was estimated. To evaluate the structural state of the alloy at various transformation stages, the authors used X-ray diffraction analysis (XRD). The crystal structure rearrangement during the transformation is shown by the example of splitting the initial cubic A1-phase peak (200) into two tetragonal ordered L10 phase peaks – (200) and (002). Based on the resistometry and X-ray diffraction analysis data, the authors carried out a quantitative assessment of the rate of the disorder→order phase transformation in the alloy under the study. It is established that the values of the transformed volume fraction (resistometry) and the long-range order degree (X-ray diffraction analysis) are close. The study shows that in the temperature range of 200–250 °C, the rate of atomic ordering according to the L10 type in the nonstoichiometric alloy Cu–56 at. % Au is maximum at 250 °C. It is identified that the disorder→order transformation in the initially quenched specimens of the investigated alloy proceeds approximately an order of magnitude faster than in preliminarily deformed specimens. © 2023 Togliatti State University. All rights reserved.
SPM-2023; Russian Science Foundation, RSF: 21-13-00135 Acknowledgments: The work was financially supported by the Russian Science Foundation (grant No. 21-13-00135). The work was financially supported by the Russian Science Foundation (grant No. 21-13-00135). The paper was written using the reports of the participants of the XI International School of Physical Materials Science (SPM-2023), Togliatti, September 11–15, 2023. |
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| Дата |
2024-04-05T16:34:55Z
2024-04-05T16:34:55Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Подгорбунская, ПО, Згибнев, ДА, Гаврилова, АА, Новикова, О & Волков, АЮ 2023, 'Кинетика формирования сверхструктуры L10 в сплаве Cu–56Au (ат. %): резистометрическое исследование', Frontier Materials & Technologies, № 3, стр. 83-94. https://doi.org/10.18323/2782-4039-2023-3-65-8
Подгорбунская, П. О., Згибнев, Д. А., Гаврилова, А. А., Новикова, О., & Волков, А. Ю. (2023). Кинетика формирования сверхструктуры L10 в сплаве Cu–56Au (ат. %): резистометрическое исследование. Frontier Materials & Technologies, (3), 83-94. https://doi.org/10.18323/2782-4039-2023-3-65-8 2782-4039 Final All Open Access, Gold https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174932783&doi=10.18323%2f2782-4039-2023-3-65-8&partnerID=40&md5=aabe0b519342992be97d2be86da79ecb https://www.vektornaukitech.ru/jour/article/download/871/817 http://elar.urfu.ru/handle/10995/130882 54621621 10.18323/2782-4039-2023-3-65-8 85174932783 |
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| Язык |
en
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| Связанные ресурсы |
info:eu-repo/grantAgreement/RSF//21-13-00135
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Togliatti State University
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| Источник |
Frontier materials & technologies
Frontier Materials and Technologies |
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