METHOD OF PRODUCING ALUMINIUM-BASED NEUTRON-ABSORBING MATERIAL CONTAINING LAYERS WITH BORON CARBIDE Russian patent published in 2019 - IPC C22C21/00 C22C1/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to production of laminar material based on aluminium and its alloys containing layers with boron carbide, and can be used as structural materials for aviation and in nuclear industry, which combine low specific weight with efficient absorption of neutron radiation. Method of producing aluminium-based neutron-absorbing material containing layers with boron carbide involves obtaining a molten aluminium with temperature higher than liquidus temperature, containing 28–35 vol. %. boron carbide particles with grain size of 1–60 mcm, wherein aluminium melt without particles of boron carbide with temperature of 100–150°C is obtained above liquidus temperature, poured into heated horizontal mold of centrifugal casting, rotating with gravitation coefficient of 70–140, with formation of first metal layer on mold surface, then melt of protective flux is poured into mold and next layers of metal are formed, successively pouring to molten flux of molten aluminium containing particles of boron carbide, then aluminium melt without boron particles, then molten aluminium containing boron carbide particles, and then aluminium melt without boron particles, wherein said molten metal melt is applied to flux melt after cooling of previous metal layer to solidus temperature.

EFFECT: technical result of the invention is obtaining large hollow cylindrical blanks of neutron-absorbing material based on aluminium, containing layers of metal with boron carbide, uniformly distributed over their thickness.

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