A method of calculating the size distribution of supercritical nuclei in the presence of flows in a melt or in a vapor for the first-order phase transition, namely, for crystallization or condensation, has been proposed. The method is confirmed by the comparison with the results of experimental studies of centrifugal casting of Al.

A calculation method of size distribution of heavily postcritical nucleation centers in the presence of a flow in melt or vapour for first-order phase transition, i.e., crystallization or condensation, is proposed. The considered method has been confirmed by an experimental investigation of the centrifugal casting of Al.

A specific distribution of supercritical nuclei, taking into account the presence of the macroscopic motion, i.e., rotation, has been found in this work. A calculation method of size distribution of heavily postcritical nucleation centers is proposed. The distribution of supercritical nucleation centers in the presence of flow effect, which was obtained here theoretically, is confirmed by an experimental investigation of the centrifugal casting of Al.

Дизайн градиентных композитных материалов на основе алюминия и графита методом центробежного литья© Е

The effect of rotation flow emerging under centrifugal casting on the first-order phase transition, i.e., crystallization, has been studied using the example of producing a gradient composite material of AK12 aluminum alloy in a mixture with basalt fibers. It has been shown that a material with a hardened surface can be created. Distribution of admixtures in the main material when there is macroscopic motion has been found.

AbstractThe effect of rotation flow emerging under centrifugal casting on the first-order phase transition, i.e., crystallization, has been studied using the example of producing a gradient composite material of AK12 aluminum alloy in a mixture with basalt fibers. It has been shown that a material with a hardened surface can be created. Distribution of admixtures in the main material when there is macroscopic motion has been found.

A method of centrifugal casting of aluminum composites in a mixture with Al2O3 and C is proposed and proved by experiments. It is shown that there is a possibility of constructing gradients of admixtures, that is, of hardening the surface layer. It is specified how the concentration gradients are formed: the first technique is use of buoyance force and the second technique is redistribution of nuclei by size when they are exposed to rotation.

The distribution of heavily post-critical nucleation centers in the nucleation kinetics subject to the macroscopic flow effect has been successfully obtained. Examples of rotary and convective motions during the centrifugal casting are considered. The obtained distribution has been confirmed by an experimental investigation of the composite material AK12 (boron carbide (B4C)) crystallization.