Abstract
The structure, chemical and phase compositions, hardness, and wear resistance of a Cu–Ti–Al–Ni–Fe–C–B composite prepared by self-propagating high-temperature synthesis (SHS) have been studied. The matrix was formed by Сu–8.5Al–5.0Ni–4.0Fe–1.0Si–0.2Cr aluminum bronze. The powders of Ti, C, and B4C were used for synthesis. The composite matrix is shown to be a copper-based solid solution, which contains eutectic (Cu + (Ni,Fe)Al) regions with the microhardness of 900 HV 0.1. The strengthening phases are TiC and TiB2. The microhardness of (γ + TiC) regions is 550 HV 0.1, and that of (Cu + TiB2 + TiC) regions is 700 HV 0.1. The integral hardness of the composite is 62 HRC. The (γ + TiC) regions are the most plastic structural component of the composite, which are characterized by a high maximum indentation depth, the total mechanical work of indentation and a component of plastic indentation work (φ), and indentation creep (СIT). Abrasive wear results in cut-off of the surface layers of the structural components (Cu + TiC) and (Cu + (Ni,Fe)Al) with the formation of a smooth surface. The roughness of the sample surface does not exceed 2.8 μm.
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This work was supported by the Russia Science Foundation, project no. 22-29-00188.
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Translated by N. Podymova
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Pugacheva, N.B., Bykova, T.M. & Senaeva, E.I. The Structure and Fracture Pattern of a Сu–Ti–Al–Ni–Fe–C–B Composite after Abrasive Wear. Phys. Metals Metallogr. 123, 963–970 (2022). https://doi.org/10.1134/S0031918X22600920
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DOI: https://doi.org/10.1134/S0031918X22600920