Category Archives: физико-математический анализ

Thermodynamic analysis of joint aluminothermal recovery ZrO2 and Nb2O5

S. N. Agafonov, A. A. Ponomarenko, A. S. Russkikh

ABSTRACT

In this work, we studied the joint aluminothermic reduction of zirconium and niobium oxides. Thermodynamic modeling of metal-thermal reactions, differential thermal (DTA) and X-ray phase (XRF) analyzes were used in the work. The research can serve as a scientific basis for the development of promising metal-thermal technologies for the production of rare-metal alloys.

KEYWORDS

thermodynamic modeling, aluminothermic reduction, alloy, zirconium, aluminum, niobium, oxides

DOI: 10.7868/S023501061901002X

Investigation of the minimum interatomic distance in liquid metals based on acoustic data

V. V. Tekuchev, D. P. Kalinkin, I. V. Ivanova, A. V. Arshinov

ABSTRACT:

Within the framework of the statistical theory, hard_sphere models for the first time, based on ultrasound velocity data, determine the shortest interatomic distance of 24 metals from the melting point to the boiling point. With increasing temperature, the diameter of hard spheres (the minimum interatomic distance) decreases linearly. The polytherms of the interatomic distance for liquid metals are also valid for the solid phase.

KEY WORDS:

metals, ultrasound velocity, diameter of hard spheres, minimum interatomic distance.