Abstract
The Al–5% Cu alloy-based metal-matrix composite materials reinforced with 5-μm B4C particles have been produced using mechanical mixing-in method. A process of addition of the B4C particles into the melt has been developed. A homogeneous distribution of the B4C reinforcing particles in the metal-matrix composite matrix was obtained. Using X-ray diffraction analysis, the formation of Al3BC and AlB2 phases has been revealed at the interphase matrix/particle boundary, which indicates a good interaction in the phases. With increasing B4C content in the matrix alloy, an insignificant increase in the porosity (from 1 to 3.1%) occurs. The average linear thermal-expansion coefficient is reduced from 24.5 to 22.6 × 10–6 K–1 in the temperature range of 20–100°C.
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Original Russian Text © A.V. Pozdniakov, A. Lotfy, A. Qadir, V.S. Zolotorevskiy, 2016, published in Fizika Metallov i Metallovedenie, 2016, Vol. 117, No. 8, pp. 811–816.
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Pozdniakov, A.V., Lotfy, A., Qadir, A. et al. Effect of the B4C content on the structure and thermal expansion coefficient of the Al–5% Cu alloy-based metal-matrix composite material. Phys. Metals Metallogr. 117, 783–788 (2016). https://doi.org/10.1134/S0031918X16060107
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DOI: https://doi.org/10.1134/S0031918X16060107