To produce Al–Al2O3 cermet with a heterogeneous granular-layered structure, mixing of flake aluminum powder of the PAP-2 brand with the plasma-chemical alumina powder (PCAP) consisting of nano-thick lamellar agglomerates in a planetary ball mill in the mechanical alloying mode was carried out. The resulting charge, consisting of layered granules containing alternating alumina and aluminum layers, was compacted under a pressure of 700 MPa. Sintering of green samples was carried out in a vacuum (10–5 mm Hg) at a temperature of 650 ? for 1 hour. The content of the alumina component in the cermet composition in the amount of 15% by weight ensured a combination of low density – 2.54 g/cm3 with significant indicators of its mechanical properties (flexural strength – 280 MPa, axial compression strength – 350 MPa, crack resistance – 8.5 MPa?m1/2, microhardness – 1070 MPa) as a result of achieving a compromise between the plasticity of this composite and its hardness. Cermet can be used as lightweight armor protection elements, wear-resistant elements and special abrasive tools.
Dmitry A. Ivanov – Doctor of Technical Sciences, Professor of the Educational Center “New Materials and Production Technologies”, Moscow Aviation Institute (National Research University), Moscow, Russia
Maria B. Afonina – Candidate of Technical Sciences, Associate Professor of the Educational Center “New Materials and Production Technologies”, Moscow Aviation Institute (National Research University), Moscow, Russia
Aleksey V. Shalin – Candidate of Technical Sciences, Associate Professor of the Educational Center “New Materials and Production Technologies”, Moscow Aviation Institute (National Research University), Moscow, Russia
Sergey M. Sarychev – Candidate of Technical Sciences, Associate Professor of the Educational Center “New Materials and Production Technologies”, Moscow Aviation Institute (National Research University), Moscow, Russia
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