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Mahmud Elkady, A. V. Minitsky, I. Yu. Trosnikova, P. I. Loboda, And D. S. Leonov
Effect of Plating of Carbon Fibres with Ni on Properties of Fe-Based Materials
0875–0882 (2022)

PACS numbers: 62.20.fg, 62.23.Pq, 81.05.Ni, 81.20.Ev, 81.40.Lm

The structure and properties of the material based on carbonyl iron reinforced with carbon fibres, which are previously plated with nickel, are studied. Uncoated carbon fibres are used for the first group of samples, and nickel-plated carbon fibres are used for the second group. Nickel plating is found to provide better adhesive interaction between carbon fibres and iron. As shown, the reinforcement with nickel-plated carbon fibres allows increasing both the strength limit and the plasticity of materials. At the same time, for samples sintered at 900°C, the strength does not increase fundamentally (from 661 MPa to 697 MPa), but the relative elongation doubles from 22.7% to 45.1%. Using the method of fractographic analysis, the viscous nature of the destruction of the samples is established, and it is shown that the microrelief of the surface is characterized by oblique fractures, which is due to the formation of viscous dimples under the action of tangential stresses. An increase in the sintering temperature to 1000°C provides an increase in the compressive strength of the samples to 1002–1185 MPa, while the samples containing clad fibres have strength of 180–185 MPa higher than the strength of samples with carbon fibres not plated with nickel.

Key words: iron, nickel, plating, reinforcement, carbon fibres.

https://doi.org/10.15407/nnn.20.04.875

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