Abstract
Transmission electron microscopy was used to perform a structural analysis of a number of binary copper alloys with 3d transition elements after short-term annealing in an oxidative atmosphere (5 and 30 min) at a temperature of 700°C. It has been established that the textured tapes of Cu–Cr and Cu–Fe alloys sustain not only surface oxidation in the process of additional annealing, but also internal oxidation. Electron diffraction analysis has shown that a layer of complex spinel-type CuМ2O4 oxide (М = Cr, Fe) forms on alloying element particles under annealing, while the precipitation of dispersed copper oxides, predominantly, Cu2O with a small admixture of CuO occurs in the copper matrix. Microhardness analysis has demonstrated that internal oxidation in the tapes of the studied binary alloys does not have an adverse effect on their mechanical properties.
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ACKNOWLEDGMENTS
Structural studies were performed in the Department of Electron Microscopy of the Shared Facilities Center “Testing Center for Nanotechnologies and Advanced Materials” of Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences. This work was performed within the state task on the subject Pressure (grant no. AAAA-A18-118020190104-3) and supported in part by the Russian Foundation for Basic Research (grant no. 18-33-00309 mol_a)
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Translated by E. Glushachenkova
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Khlebnikova, Y.V., Suaridze, T.R., Egorova, L.Y. et al. Internal Oxidation of Textured Thin Tapes of Binary Copper-Based Alloys. Phys. Metals Metallogr. 119, 1107–1113 (2018). https://doi.org/10.1134/S0031918X1811008X
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DOI: https://doi.org/10.1134/S0031918X1811008X