Abstract
Cu + Cr3C2 composites have been produced using the mechanical alloying of the elemental components, followed by severe plastic deformation by torsion, magnetic-pulse pressing, and electric-pulse plasma sintering. The composites are studied using X-ray diffraction and light and electron microscopy, as well as measurements of the hardness, density, and electric conductivity. Magnetic-pulse pressing at a temperature of 500°C makes it possible to produce volume nanocomposites with a homogeneous distribution of dispersed carbides over the copper matrix, which has a density of 96%, a Vickers microhardness of 4.6 GPa, a Rockwell hardness of 69 HRA, and an electric conductivity of 19% IACS units. Using electric-pulse plasma sintering at a temperature of 700°C, composites with the nanostructured copper matrix, which contains carbide inclusions and consists of domains surrounded by a layer of nearly pure copper, have been produced. These composites have a density of 88%, a Vickers microhardness of 4.0 GPa, a Rockwell hardness of 58 HRA, and electric conductivity of 26% IACS units.
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Original Russian Text © M.A. Eremina, S.F. Lomaeva, S.N. Paranin, S.L. Demakov, E.P. Elsukov, 2016, published in Fizika Metallov i Metallovedenie, 2016, Vol. 117, No. 5, pp. 530–537.
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Eremina, M.A., Lomaeva, S.F., Paranin, S.N. et al. Effect of compaction method on the structure and properties of bulk Cu + Cr3C2 composites. Phys. Metals Metallogr. 117, 510–517 (2016). https://doi.org/10.1134/S0031918X16050057
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DOI: https://doi.org/10.1134/S0031918X16050057