Temperature Dependence of Surface Tension of Eutectic Alloy

Dadashev, R. Kh.; Алчагиров, Б. Б.; Elimkhanov, D. Z.; Talkhigova, H. S.; Dadasheva, Z. I.

doi:10.17277/vestnik.2020.01.pp.124-132

Cited by 3 publications

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“…The authors explain the emergence of these peculiarities by the eutectic structure influence on the ST isotherms and the clusters formation on the surface. The research in paper [15], based on the analysis of adsorption phenomena, proves that the features on the ST isotherms and the ST temperature coefficient in this system are due to adsorption processes rather than the eutectic structure impact. Pb-Bi system.…”

Section: Mj/m2mentioning

confidence: 80%

Concentration Dependence of the Surface Tension of Three and Four-Component Systems with Peculiarities in the Surface Tension Isotherms of Lateral Binary Melts

Dadashev

Kutuev

2021

MSF

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The experimental study results of the melts concentration dependence of the surface tension of the four-component indium-tin-lead-bismuth system and its constituent binary systems of indium-tin, indium-lead, indium-bismuth, tin-lead, tin-bismuth, lead-bismuth are presented in the paper. It is shown that the concentration dependence of the melts surface tension of the In-Sn-Pb-Bi four-component system can be predicted from the data on ST (surface tension) values of lateral binary systems. Features in the ST isotherms in the form of a minimum are observed only in the indium-tin lateral system from all lateral binaries. A distinctive feature of the detected minimum is that the minimum depth slightly exceeds the experimental error. Therefore, in addition to the fact that the area of average compositions was studied more thoroughly, we carried out the surface tension measurements by two independent methods. The experimental data obtained by both methods coincide within the experimental error and indicate the extremum availability on ST isotherms. Thus, ST experimental studies by two independent methods confirmed the presence of a flat minimum on ST isotherms of the indium-tin binary system increasing the reliability of the obtained data. The obtained outcomes and their comparison with experimental data have shown that the considered models for predicting surface properties based on data due to similar properties of lateral binary systems adequately reflect the experimental dependences. However, the prediction model based on Kohler's method of excess values describes the experimental curves more accurately.

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Section: Mj/m2mentioning

confidence: 80%

Concentration Dependence of the Surface Tension of Three and Four-Component Systems with Peculiarities in the Surface Tension Isotherms of Lateral Binary Melts

Dadashev

Kutuev

2021

MSF

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Surface Tension and Density of Indium–tin Melts and Their Dependence on Composition and Temperature

Dadashev,

Kutuev,

Elimkhanov

2023

Rasplavy

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The paper presents the results of measuring the surface tension (σ) and density (ρ) of indium-tin melts. The measurements of σ and ρ were carried out by different methods. The surface tension was measured by the sessile drop method and the maximum pressure in the droplet, while the density was measured by the areometer and sessile drop methods. High-purity metals In-00, tin – VHF were used for research. The maximum measurement error σ is 0.8%, and ρ is 0.2%. The dependence of σ of In–Sn melts on the composition is characterized by an extremum (flat minimum) in the region of equimolar composition. As the temperature increases, the depth of the minimum decreases, and its position shifts towards pure indium. Molar volumes have small positive deviations from additive values. As the temperature increases, the molar volumes approach additive values. The sessile drop method was used to measure the temperature dependences of σ and ρ of In–Sn solutions diluted with indium. It has been shown that indium additives lower the surface tension of tin. Given that the value of the surface tension of indium is higher than that of tin, this result indicates that the surface tension isotherms of the indium-tin system must pass through a minimum.

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On the incidence of genitourinary pathology in residents of the Chechen Republic

Alimsultanova

Bazaeva

Dindigov

et al. 2020

Spravočnik Vrača Obŝej Praktiki (Journal of Family Medicine)

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The article considers result of studying the prevalence of diseases of the genitourinary system among residents of the Chechen Republic, a comparative analysis of the incidence rates in the republic for diseases of the genitourinary system with similar indicators in the Russian Federation and the North Caucasian Federal District is carried out. The aim of the study was to conduct a comparative analysis of the incidence of diseases of the genitourinary system and urolithiasis in residents of the Chechen Republic (CR) with similar rates from all over Russia and the North Caucasian Federal District. Statistical data on the incidence of these nosologies in 2014 and 2015 according to the Federal State Statistics Service across the Russian Federation (RF), in the Chechen Republic, as well as in the North Caucasian Federal District was used as a method of research. Analysis of statistics on the incidence of diseases of the genitourinary system, prevalence of urolithiasis, chronic renal failure in Russia as a whole showed a clear tendency to increase in these indicators over the past decades. Previous studies have found that drinking water obtained from the rivers of the Chechen Republic and its tributaries is one of the main pathways for delivering trace elements, including heavy metal salts, to the body of residents of Chechnya. With this factor in mind, a much worse situation in the Chechen Republic was revealed than across Russia and in the North Caucasian Federal District. As a result of the study, it was found that the overall incidence of genitourinary pathology, chronic renal failure, rates of the newly detected incidence of the genitourinary system, urolithiasis and chronic renal failure during the study period was significantly higher in the Chechen Republic. Although the overall incidence of urolithiasis in the Chechen Republic did not exceed similar rates in Russia and the North Caucasian Federal District, it increased significantly in 2015 in comparison with 2014.

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Temperature Dependence of Surface Tension of Eutectic Alloy

Cited by 3 publications

References 0 publications

Concentration Dependence of the Surface Tension of Three and Four-Component Systems with Peculiarities in the Surface Tension Isotherms of Lateral Binary Melts

Concentration Dependence of the Surface Tension of Three and Four-Component Systems with Peculiarities in the Surface Tension Isotherms of Lateral Binary Melts

Surface Tension and Density of Indium–tin Melts and Their Dependence on Composition and Temperature

On the incidence of genitourinary pathology in residents of the Chechen Republic

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