Cold crystallization kinetics of slag from the joint smelting of oxidized nickel and sulfide copper ores

Journal of Thermal Analysis and Calorimetry - The cold crystallization kinetics of the glass-crystal composition (90.3 vol% of glass) made of slag from the joint smelting of oxidized nickel and...     

Methods of correcting the results of quantitative analyses in X-ray photoelectron spectroscopy

A method of reducing the error of component concentration calculation of a multicomponent system is proposed. The method is based on an iteration technique using tabulated sensitivity coefficients of elements and one standard sample. Translated fromZhurnal Struktumoi Khimii, Vol. 39, No. 6, pp. 1151–1153, November–December, 1998.     

Method to determine the work function using X-ray photoelectron spectroscopy

A method is suggested to determine the work function from the Fermi level of metals and alloys and to evaluate the contact potential difference between the sample and spectrometer as well as between contacting samples. Translated fromZhurnal Struktumoi Khimii, Vol. 39, No. 6, pp. 1147–1150, November–December, 1998.     

Development of NaNO2–O2 system as an oxidant at uranium leaching processes

A process of ferrous ion oxidation by sodium nitrite in sulfate uranium in situ leaching solutions was investigated. Kinetic, spectrophotometric, and heat effect studies have been made in order to investigate the chemistry of the oxidation process. As a result the method of ferrous ion oxidation in uranium in situ leaching solution was developed that makes possible to decrease sodium nitrite consumption by 20?C30 times comparing with traditional oxidation technique. It was founded also that process of ferrous ion oxidation can be conducted with partial sodium nitrite recirculation.     

Variation of elastic characteristics of metastable austenite steel under cycling straining

We have analyzed the effect of elastoplastic cyclic straining on anisotropy of elastic properties of 08Kh18N10T metastable austenite steel. The possibility of determining the strain amplitude of the fatigue loading cycle by an acoustic method involving measuring the elastic characteristic of the material has been demonstrated. The resulting experimental dependences that can be used to estimate the number of cycles before failure using ultrasonic measurements have been revealed.     

Allowed regions in the problem concerning dynamics of a charged particle in a superposition of dipole and uniform magnetic fields

The motion of charged particles in the Earth’s magnetic field has been of interest to mathematicians and physicists in connection with the study of the polar aurora and cosmic rays. In 1907, Norwegian mathematician Stromer gave the mathematical formulation of this problem. It became the problem of great importance with the discovery of the Van Allen radiation. As is known, the Earth’s magnetic field can be considered approximately as a superposition of dipole and uniform magnetic fields, and the dipole’s magnetic moment is either parallel or antiparallel to the induction of the uniform field. Thus, the problem concerning the dynamics of the charged particle in the magnetic field of the Earth is reduced to that of charged particle dynamics in the composed field. The paper is devoted to the construction and investigation of the allowed regions in a superposition of dipole and uniform magnetic fields for positive values of Stormer’s constant γ and the same orientation of magnetic moment and uniform field.