PREDICTION OF THE THERMOPHYSICAL BEHAVIOR OF AMORPHOUS OF ALLOYS Ni_0.333Zr_0.667 AND La₈₀Al₂₀ ACCORDING TO PROPERTIES OF METALS

Abstract

Amorphous alloys (metallic glasses) are obtained by ultrafast cooling of melts. As a result of this process, the chaotic distribution of atoms in space is “frozen” while maintaining the short-range order characteristic of liquids. The high homogeneity of the solid state leads to unique mechanical, magnetic and other physical properties. This has led to the fact that cheaper metallic glasses have replaced a number of traditional materials in some industries. On the other hand, significant disadvantages of disordered media are temperature and time instabilities. The solution to this problem is possible with knowledge of the thermophysical properties of amorphous alloys: heat capacity, thermal expansion coefficient, thermal conductivity and thermal diffusivity. Even estimating, for example, their temperature dependences is a complex and urgent task. Therefore, in this paper, it is proposed to use the mixing rule for components whose thermophysical properties are known. This makes it possible to predict the temperature dependences of heat capacity, thermal expansion coefficient and thermal diffusivity at known values of thermal conductivity for different temperatures. Note that the obtained curves for the Ni0.333Zr0.667 and La80Al20 amorphous alloys are in good agreement with the experimental data.