scholarly journals WETTING ANGLE POLYTERMES FOR LEAD-SODIUM MELTS ON REFRACTORY METALS

2020 ◽  
pp. 113-119
Author(s):  
Барасби Сулейманович Карамурзов ◽  
Руслан Азаевич Кутуев ◽  
Мурат Хажисмелович Понежев ◽  
Виктор Адыгеевич Созаев ◽  
Астемир Хусенович Шерметов ◽  
...  
Keyword(s):  
Contact Angle ◽  
Stainless Steel ◽  
Temperature Dependence ◽  
Refractory Metals ◽  
Wetting Angle ◽  
Temperature Range ◽  
Drop Method ◽  
Pure Helium ◽  
Increasing Temperature

Методом лежащей капли изучена температурная зависимость краевого угла смачивания сплавов Pb - Na разной концентрации на подложках из Co - Cr, Ni - Cr, нержавеющей стали 251892. Измерения проводились методом лежащей капли в широком интервале температур от 359°С до 800 °С в атмосфере чистого марки А. Показано, что значение угла смачивания уменьшается с увеличением температуры, наблюдаются пороги смачивания. The temperature dependence of the contact angle for Pb - Na melts of different concentrations on Co - Cr , Ni - Cr and stainless steel 25X18H9C2 substrate was studied by the method of a lying drop. Measurements were carried out by a lying drop method in the temperature range from 359 to 800 °C in an atmosphere of pure helium grade A. It is shown that the value of the wetting angle decreases with increasing temperature, wetting thresholds are observed.

Effect of Temperature and Pressure on the Nitrogen Content of High Nitrogen Steel

2014 ◽  
Vol 886 ◽  
pp. 24-27
Author(s):  
Rong Hua Zhang ◽  
Biao Wu
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Nitrogen Content ◽  
Effect Of Temperature ◽  
High Nitrogen Steel ◽  
Temperature Range ◽  
Nitrogen Steel ◽  
Temperature And Pressure ◽  
High Pressure Reaction ◽  
Increasing Temperature

In this study, nitrogen content greater than 0.9% of 18Cr18MnN austenitic stainless steel were prepared by high pressure reaction kettle. The relationships between nitrogen content and temperature, pressure were studied. The results show the nitrogen content in steel increases with increasing melting pressure, at air pressure 1.0MPa<P<1.4MPa, the increase of nitrogen content in steel is evident particularly. In the 1813k<T<1913k temperature range, the nitrogen content in steel decreases with the increasing temperature, there are differences in variation in the temperature range. When temperature is up to 1813K, nitrogen content can be as high as 1.075%. The best thermodynamic condition of melting a nitrogen content of 0.9% 18Mn18Cr austenitic stainless steel is: pressure and temperature are 1.32MPa, 1873k, respectively.

The flow of liquids with a temperature anomaly of viscosity

2003 ◽  
Vol 3 ◽  
pp. 232-245
Author(s):  
V.N. Kireev ◽  
S.F. Urmancheev
Keyword(s):  
Fluid Flow ◽  
Temperature Dependence ◽  
Temperature Anomaly ◽  
Numerical Study ◽  
Liquid Sulfur ◽  
Temperature Range ◽  
External Conditions ◽  
Increasing Temperature ◽  
Viscosity Dependence

For the vast majority of liquids, viscosity is a function that decreases monotonically with increasing temperature. However, a number of substances in which processes of polymerization and depolymerization can occur in a certain temperature range have a viscosity with a nonmonotonic temperature dependence. This dependence, for example, is characteristic of liquid sulfur. In this paper we present the results of a numerical study of the features of the flow of a liquid with a certain model nonmonotonic viscosity dependence on the temperature. The formation of a ”viscous barrier“ that determines the nature of the fluid flow in the channel is established. The main regularities of the flow are determined depending on the parameters of the viscous anomaly and external conditions.

g-Values for γ-irradiated water as a function of temperature

1990 ◽  
Vol 68 (5) ◽  
pp. 712-719 ◽  
Author(s):  
A. John Elliot ◽  
Monique P. Chenier ◽  
Denis C. Ouellette
Keyword(s):  
Experimental Data ◽  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Temperature Dependence ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrated Electron ◽  
Temperature Range ◽  
Increasing Temperature

The g-values of primary species formed in the γ-radiolysis of water have been estimated for the temperature range 25–300 °C. The g-values for the hydrated electron, the hydroxyl radical, and molecular hydrogen all increase approximately 50% over this temperature range. The g-values for the minor products, hydrogen peroxide and atomic hydrogen, probably also increase with temperature; however, there is evidence from some of the experimental data which suggests that these g-values may slightly decrease with increasing temperature. Keywords: radiolysis, g-values, temperature dependence.

Temperature dependence of the shape of the cellodextrins in aqueous solution

1967 ◽  
Vol 45 (20) ◽  
pp. 2363-2367 ◽  
Author(s):  
M. Ihnat ◽  
D. A. I. Goring
Keyword(s):  
Aqueous Solution ◽  
Temperature Dependence ◽  
Computational Methods ◽  
Negative Temperature ◽  
Temperature Range ◽  
Temperature Coefficients ◽  
Increasing Temperature

Intrinsic viscosities of the cellodextrins, cellobiose to cellohexaose, were measured in aqueous solution at temperatures from 25 to 70 °C. Axial ratios were determined using the Einstein–Simha viscosity relation and the computational methods developed previously. The results showed that the oligomers are fully extended over this temperature range and that the negative temperature coefficients of the intrinsic viscosities are caused by the dehydration of the molecules with increasing temperature.

Surface Tension Measurement of Liquid Fe-Si-B Alloy by Sessile Drop Method

2013 ◽  
Vol 573 ◽  
pp. 9-12 ◽  
Author(s):  
Kuo Lin Chao ◽  
Shuang Shii Lian ◽  
Chung Yung Wu ◽  
Ku Ling Chang
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Liquid Drop ◽  
Sessile Drop ◽  
Digital Camera ◽  
Contact Angles ◽  
Sessile Drop Method ◽  
Surface Tension Measurement ◽  
Drop Method ◽  
Increasing Temperature

The purpose of this study is to measure contact angle and surface tension of liquid Fe-Si-B alloys at high temperature using sessile drop method. The surface tension and contact angle result is based on sessile drop method by use of a digital camera to take the drop profile and fit the profile by Youngs-Laplace equation. The surface tension of liquid Fe-Si-B alloy and its dependence on temperature has been studied. Contact angles of this liquid alloy on various refractories substrate have been determined using this instrument. The result showed that the contact angles and surface tension of Fe-4Si-3B alloy liquid drop on Al2O3 substrate have value of 134 to 127and 1575-1350 mN/m respectively. The result indicated also that increasing temperature can decrease contact angle and surface tension in Fe-Si-B alloy.

scholarly journals Аномальная электропроводность и намагниченность в сплавах системы Fe-Cr-Ni аустенитно-мартенситного класса

2019 ◽  
Vol 89 (2) ◽  
pp. 202
Author(s):  
Е.А. Протасов ◽  
В.Н. Петровский ◽  
В.Д. Миронов
Keyword(s):  
Phase Transition ◽  
Stainless Steel ◽  
Temperature Dependence ◽  
Wide Temperature Range ◽  
Spontaneous Magnetization ◽  
Anomalous Behavior ◽  
Special Steel ◽  
Austenite Stainless Steel ◽  
Temperature Range

AbstractWe have measured the temperature dependence of the resistivity and magnetization of a special steel of the Fe–Cr–Ni austenite–martensite class in a wide temperature range (77–1100 K). It is found that at temperatures 77–170 K, the resistivity of the material almost remains unchanged, but upon a further increase in temperature, the resistivity sharply increases, which is probably a result of disordering. In addition, anomalous behavior of resistivity with vanishing spontaneous magnetization is observed at 910 K, which is associated with the ferromagnet–paramagnet phase transition. Comparison of the measured ρ( T ) dependence with the analogous dependence for 12Kh18N10T austenite stainless steel has not revealed features typical of Fe–Cr–Ni steel.

Temperature dependence of the electron resonance spectrum of the hydrazine positive ion

1968 ◽  
Vol 46 (10) ◽  
pp. 1703-1706 ◽  
Author(s):  
H. R. Falle
Keyword(s):  
Temperature Dependence ◽  
Torsional Vibration ◽  
Hyperfine Splitting ◽  
Resonance Spectrum ◽  
Electron Resonance ◽  
Temperature Study ◽  
Temperature Range ◽  
Increasing Temperature ◽  
Positive Ion

A temperature study of the hydrazine positive ion, N2H4+, showed that the ratio of the nitrogen hyperfine splitting to the proton hyperfine splitting, |aN/aH| increased with increasing temperature. The increase in |aN/aH| was approximately 3%, while the increase in aN itself was less than 1% over the 50 °C temperature range. This effect is attributed to torsional vibration about the N—N bond and is assessed on this basis.

Specific features of the temperature dependence of tryptophan fluorescence lifetime in the temperature range of −170–20 °C

2020 ◽  
Vol 393 ◽  
pp. 112435
Author(s):  
Peter P. Knox ◽  
Vladimir V. Gorokhov ◽  
Boris N. Korvatovsky ◽  
Nadezhda P. Grishanova ◽  
Sergey N. Goryachev ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Fluorescence Lifetime ◽  
Tryptophan Fluorescence ◽  
Temperature Range
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