Using high-resolution scanning and transmission electron microscopy methods, the morphological and size characteristics of the structural components of the composites synthesized on the basis of aluminum with a graphene microadditive in a commercial aluminum melt under a layer of molten salt are studied. An experiment on the dynamic compression of a composite by the Kolsky method was performed, the evolution of a cast structure during high-rate deformation is studied, and mechanical characteristics in the range of deformation rates έ = 1.8–4.7 × 103 s–1 were measured. The dynamic characteristics of the composite were measured under conditions of loading with planar shock waves (έ = 5 × 105 s–1) for the first time. The dynamic properties of the composite are compared as functions of the graphene content in the aluminum matrix.
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We are grateful to T.I. Yablonskikh and V.V. Astaf’ev for carrying out metallographic measurements, A.V. Kulikov for his assistance in conducting explosive experiments, and Z.I. Zav’yalov for testing samples using the Hopkinson-Kolsky method.
The study was performed within the framework of State assignment from the Russian Ministry of Education and Science (topic Structure, project nos. AAAA-A18-118020190116-6 and AAAA-A19-119071190040-5). Electron microscopy studies were carried out in Center for Collective Use Testing Center for Nanotechnologies and Advanced Materials at the Institute of Metal Physics, Ural Branch, Russian Academy of Sciences. The shock-wave compression experiments were carried out using the equipment of the Moscow Regional Explosive Center for Collective Use of the Russian Academy of Sciences. The Raman spectra of graphene were recorded in Center for Collective Use Substance Composition at the Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences.
Translated by O. Kadkin
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Shirinkina, I.G., Brodova, I.G., Rasposienko, D.Y. et al. The Effect of Graphene Additives on the Structure and Properties of Aluminum. Phys. Metals Metallogr. 121, 1193–1202 (2020). https://doi.org/10.1134/S0031918X21010117
- dynamic properties
- transmission electron microscopy
- high resolution