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Investigation of thermophysical processes of obtaining various aluminum matrix composites
Myl'nikov V.V.
1, Pronin A.I.
2, Myl'nikova M.V.
1, Romanova E.A.
1, Shetulov D.I.
1
1Nizhny Novgorod State University of Architecture and Civil Engineering, Nizhny Novgorod, Russia
2KOMSOMOLSK-NA-AMURE STATE UNIVERSITY, KOMSOMOLSK-NA-AMURE, Russia
2KOMSOMOLSK-NA-AMURE STATE UNIVERSITY, KOMSOMOLSK-NA-AMURE, Russia
Email: mrmylnikov@mail.ru, mdsov@knastu.ru, mpolivceva@yandex.ru, t763@yandex.ru, schetulov@mail.ru
The possibilities of obtaining aluminum matrix composite materials of the composition Al-Al2O3 are considered by the method of liquid-phase oxidation of aluminum by purging the melt with oxygen. The obtained materials are a two-phase system with different concentrations of the solid phase. An algorithm for calculating the kinetics of aluminum oxidation in obtaining the oxide phase of an aluminum matrix composite is proposed. It is established that the beginning and completeness of the reaction on the surface of the gas bubble determines the synthesis of the oxide phase and is determined by the functions T(t), h(t) in the region of dynamic time delay, which, in turn, the queue is revealed as a function of the temperature in the contact zone of the gas bubble with the melt, taking into account the duration of the heating of the bubble along the cross section and the radius of the bubble itself. The microstructures of the obtained materials with different structural-phase state with variations in the time of purging and oxygen supply to the aluminum melt are presented. Keywords: aluminum matrix composite material, high temperature oxidation, gas bubble.
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