Viscous Properties of Nickel-Containing Binary Metal Melts

TL;DR

This study uses molecular dynamics to analyze the viscosity of nickel-containing binary metal melts across various temperatures, confirming the applicability of Kelton's model and emphasizing the need for complex entropy representations.

Contribution

It demonstrates the temperature dependence of melt viscosity aligns with Kelton's quasi-universal model and highlights the importance of advanced entropy models for accurate viscosity descriptions.

Findings

Viscosity follows Kelton's quasi-universal model.

Simple pair correlation entropy is insufficient for accurate modeling.

Complex entropy representations improve viscosity predictions.

Abstract

The paper presents the results of molecular dynamics study of the viscosity of nickel-containing binary metal melts for a wide range of temperatures, including the region of the equilibrium liquid phase and supercooled melt. It is shown that the temperature dependencies of the viscosity of binary metal melts are described by the Kelton's quasi-universal model. Based on the analysis of the viscosity coefficient of the binary melt composition within the framework of the Rosenfeld's scale transfor\-mations, it has been established that to correctly describe the viscosity of binary/multi\-component metal melts within the framework of entropy models, it is necessary to use a more complex representation of the excess entropy $S_{ex}$ than in the approximation of pair correlation entropy $S_2$.