Olga Chikova, Vladimir Tsepelev, Vladimir V’yukhin, Kseniya Shmakovа, Vadim Il’in


The kinematic viscosity and electrical resistivity of equiatomic liquid alloys CuNiAl, CuNiAlCo, CuNiAlCoFe were measured during heating of the sample to 2070 K and subsequent cooling. The kinematic viscosity was measured using the damped torsional vibrations of a crucible with a melt. The measuring results are discussed within the theory of absolute reaction rates. The entropy of activation of viscous flow (characteristic of the structural state of the melt) was are determined by analyzing the temperature dependences of kinematic viscosity. The electrical resistivity was measured was using the rotating magnetic field method. The temperature coefficient of resistivity (characteristic of the structural state of the melt) was are determined. The measuring results interpreted using the Nagel-Tauc model. We considerCuNiAl, CuNiAlCo, CuNiAlCoFe alloysof equiatomic compositions as the multi-principal element alloys (MPEAs),  the complex concentrated alloys (CCAs), the high-entropy alloys (HEAs). It based on the available microgeterogenity concept the measuring results of the vickosity and the resistivity are discussed. We were looking for temperatureis of the heating a melt for destroy of microheterogeneity and mixing components on an atomic scale T*. The temperature T*=1800 K could be determined only  for alloy CuNiAl of equiatomic composition. We have made the assumption that the heating of uid alloy CuNiAl the more 1800K in subsequent crystallization even at relatively low speeds will provide of more homogeneous structure volumetric ingots.


CuAlNi; CuAlNiCo; CuNiAlCoFe; equiatomic compositions; destroy of microheterogeneity; temperature coefficient of resistivity

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