Viscosity and Density of Co-B Liquid Fusions

2016 ◽  
Vol 705 ◽  
pp. 209-213 ◽  
Author(s):  
Viktor Konashkov ◽  
Vladimir Vyukhin ◽  
Vladimir Tsepelev
Keyword(s):  
Experimental Data ◽  
Chemical Composition ◽  
Liquid Alloy ◽  
Kinematic Viscosity ◽  
Boron Concentration ◽  
Sessile Drop ◽  
Liquid Alloys ◽  
Density Data ◽  
Density Measurements ◽  
Eutectic Concentration

Kinematic viscosity and density of cobalt liquid alloys with boron is studied. Range of boron concentration was from 1 to 8 mass percent. The chemical composition of real industrial alloys is in limits of this range of concentration. Viscosity and density measurements of all samples are taken in a wide temperature interval. Measurements of viscosity are taken by method of torsional fluctuations of a crucible with fusion. Measurements of density are taken by method of a sessile drop. Existence of density data significantly increased the accuracy of processing of experimental data of viscosity. It is revealed that kinematic viscosity can be different at one and same chemical composition of an alloy. It is established that upon transition through the eutectic concentration of boron, nature of viscosity dependences from temperature of a liquid alloy changes. The explanation option of the found regularities is offered.

Surface Tension of Cu – Bi Alloys And Wettability in a Liquid Alloy – Refractory Material – Gaseous Phase System

2014 ◽  
Vol 59 (1) ◽  
pp. 282-286 ◽  
Author(s):  
B. Oleksiak ◽  
J. Łabaj ◽  
J. Wieczorek ◽  
A. Blacha-Grzechnik ◽  
R. Burdzik
Keyword(s):  
Surface Tension ◽  
High Temperature ◽  
Chemical Composition ◽  
Refractory Material ◽  
Liquid Alloy ◽  
Gaseous Phase ◽  
Sessile Drop ◽  
Sessile Drop Method ◽  
Phase System ◽  
Refractory Materials

Abstract The study involved measurements of surface tension of liquid binary copper-bismuth alloys with respect to their chemical composition and temperature as well as investigations of the liquid alloy - refractory material - gaseous phase system wettability using usual refractory materials, i.e. aluminium oxide, magnesium oxide and graphite. The experiments were performed with the use of sessile drop method and a high-temperature microscope coupled with a camera and a computer was utilised.

scholarly journals Surface properties and wetting behavior of liquid Ag-Sb-Sn alloys

2012 ◽  
Vol 48 (3) ◽  
pp. 443-448 ◽  
Author(s):  
V. Sklyarchuk ◽  
Yu. Plevachuka ◽  
I. Kaban ◽  
R. Novakovic
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Surface Properties ◽  
Regular Solution ◽  
Wide Temperature Range ◽  
Thermodynamic Model ◽  
Sessile Drop ◽  
Sessile Drop Method ◽  
Experimental Results ◽  
Density Measurements

Surface tension and density measurements of liquid Ag-Sb-Sn alloys were carried out over a wide temperature range by using the sessile drop method. The surface tension experimental data were analyzed by the Butler thermodynamic model in the regular solution approximation. The wetting characteristics of these alloys on Cu and Ni substrates have been also determined. The new experimental results were compared with the calculated values as well as with data available in the literature.

Conceptual Approach to Development, Structure Formation and Hardening Micro-Alloyed by Steels for the Metallurgical Tool

2020 ◽  
Vol 299 ◽  
pp. 658-663
Author(s):  
S.E. Krylova ◽  
Sergey V. Gladkovskii ◽  
E.V. Romashkov
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Chemical Composition ◽  
Structure Formation ◽  
Structural Parameters ◽  
Structural Transformations ◽  
Conceptual Approach ◽  
Phase And Structural Transformations ◽  
Technological Cycle ◽  
Development Structure

The scientific bases for the development of rational compositions and methods for hardening a large-sized metallurgical tool from micro-alloyed steels are stated. Based on the generalization of the experimental data, the regularities of phase and structural transformations at various stages of the technological cycle are revealed; the relationships between structural parameters, chemical composition and mechanical properties have been studied and described.

Viscosity Of Molten Rare Earth Metal Trichlorides I. Cecl3, Ndcl3, Smcl3, Dycl3 And Ercl3

2003 ◽  
Vol 58 (7-8) ◽  
pp. 457-463 ◽  
Author(s):  
A. Potapov ◽  
V. Khokhlov ◽  
Y. Satoa
Keyword(s):  
Activation Energy ◽  
Rare Earth ◽  
Viscous Flow ◽  
Rare Earth Metal ◽  
Dynamic Viscosity ◽  
Kinematic Viscosity ◽  
Arrhenius Equation ◽  
Earth Metal ◽  
Capillary Viscometer ◽  
Density Data

The kinematic viscosity of molten CeCl3, NdCl3, SmCl3, DyCl3 and ErCl3 has been measured by using a capillary viscometer. The dynamic viscosity was computed by using density data taken from the literature. The viscosity increases with going from CeCl3 to ErCl3. The activation energy of the viscous flow, calculated by the Arrhenius equation, rises in the same order.

Research on Aging Characteristics and Chemical Composition of Hydrogenated Transformer Oil

2012 ◽  
Vol 614-615 ◽  
pp. 1131-1137 ◽  
Author(s):  
Xu Dong Ouyang ◽  
Yi Hua Qian ◽  
Wei Su ◽  
Yi Bin Huang
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Loss Factor ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Dielectric Loss Factor ◽  
Transformer Oil ◽  
Composition Variation

Under the condition of Baader aging, the chemical composition variation and the effect of transformer oil aging on electrical properties such as dielectric loss factor and physic-chemical properties such as kinematic viscosity were studied during aging. Moreover, the correlation between hydrogenated transformer oil electrical and physic-chemical properties and its chemical composition variation were investigated.

A detailed gravity profile across the English River Subprovince, northwestern Ontario

1984 ◽  
Vol 21 (2) ◽  
pp. 145-151 ◽  
Author(s):  
V. K. Gupta ◽  
R. B. Barlow
Keyword(s):  
Seismic Data ◽  
Bouguer Anomaly ◽  
Density Data ◽  
Density Measurements ◽  
Anomaly Field ◽  
Red Lake ◽  
Northwestern Ontario ◽  
Crustal Model ◽  
Regional Gravity ◽  
Gravity Profile

This paper presents the results of a detailed gravity profile measured across the two lithotectonic domains of the English River Subprovince from Vermilion Bay to Red Lake, a distance of 190 km, in northwestern Ontario. Along the profile 283 fresh rock samples were collected for density measurements. The density data clearly suggest that there is a measurable and significant density difference between the migmatized metasediments and plutonic rocks.A crustal model based on the seismic data, along the profile, has been used for computing a regional gravity field, which in turn has been used in isolating the residual anomalies from the Bouguer anomaly field. A strong correlation has been found to exist between the residual anomalies, the rock densities, and the surface lithologies. The Northern Supracrustal Domain, which is at its widest (60 km) along the profile, is dominated by a pronounced 15 mGal (150 μm s−2) positive residual anomaly believed to be caused by outcropping, anomalously dense metasediments extending to a modelled depth of approximately 10 km. In the Southern Plutonic Domain the residual anomalies along the profile are small (less than 5 mGal (50 μm s−2)) and limited in depth. The Mystery Lake dome extends to a modelled depth of approximately 2.5 km.

Flammability of the Disperse-Filled Polymer Composites

2016 ◽  
Vol 871 ◽  
pp. 40-46 ◽  
Author(s):  
Andrey Askadsky ◽  
Valentin Ushkov ◽  
Vladimir Smirnov ◽  
Viktor Voronin
Keyword(s):  
Experimental Data ◽  
Chemical Composition ◽  
Specific Heat ◽  
Main Parameter ◽  
Building Materials ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Polymer Binders ◽  
Mineral Fillers ◽  
Epoxy Matrices

For the purpose of fire safe construction it is necessary to develop and investigate effects of fillers to flammability of building materials, including composite materials with polymer matrix. In present work we demonstrate the results of such investigation. We have examined influence of chemical composition, amount of mineral fillers to flammability, smoke-forming ability and limiting oxygen index of building materials based on different polymer binders. The experimental data indicate that the main parameter which determines the influence of mineral fillers on the flammability of composites is a specific heat absorbed by the filler. The dependence between limiting oxygen index and specific heat of mineral fillers is revealed for composites with epoxy matrices. This dependence is simple and beneficial for practical use.

scholarly journals Ionospheric variations before some large earthquakes over Sumatra

2011 ◽  
Vol 11 (2) ◽  
pp. 597-611 ◽  
Author(s):  
A. M. Hasbi ◽  
M. A. Mohd Ali ◽  
N. Misran
Keyword(s):  
Electron Density ◽  
Earthquake Epicenter ◽  
Equatorial Anomaly ◽  
Density Data ◽  
Density Measurements ◽  
Champ Satellite ◽  
Density Analysis ◽  
Large Earthquakes ◽  
Electron Density Analysis ◽  
Champ Data

Abstract. The paper investigates the ionospheric variations before some large earthquakes that occurred during 2004–2007 in Sumatra using GPS and CHAMP data. The TEC shows the occurrence of positive and negative anomalies detected within a few hours to 6 days before the earthquakes. These anomalies mostly occur during the daytime hours between 4 and 17 LT. The TEC anomalies are mostly consistent with the CHAMP satellite electron density data. The electron density analysis over the 28 March 2005 earthquake epicenter shows that an equatorial anomaly modification took place a few days before the event. The modification took shape in the form of crest amplification during the daytime. The comparison between the TEC and electron density measurements during very quiet geomagnetic conditions is shown to be a useful indicator of a forthcoming earthquake.

Composition-dependent magnitude of atomic shuffles in Ti–Nb martensites

2014 ◽  
Vol 47 (4) ◽  
pp. 1374-1379 ◽  
Author(s):  
Matthias Bönisch ◽  
Mariana Calin ◽  
Lars Giebeler ◽  
Arne Helth ◽  
Annett Gebert ◽  
...  
Keyword(s):  
Experimental Data ◽  
Chemical Composition ◽  
Diffraction Data ◽  
Structural Changes ◽  
Structural Characteristics ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
Orthorhombic Unit Cell ◽  
Homogenization Treatment ◽  
X Ray

In this work the structural characteristics of martensitic phases in the Ti–Nb system are studied in detail. While the distortion of the orthorhombic unit cell of α′′-martensite by the addition of β-stabilizing atoms is well documented in the literature, comprehensive experimental data on the detailed atomic positions and how they vary with chemical composition are missing. For this study, a series of binary Ti–Nb alloys were prepared by casting techniques, followed by homogenization treatment and water quenching. Rietveld-based analyses of X-ray diffraction data were used to study the gradual structural changes of α′- and α′′-martensites effected by the addition of Nb, and their compositional boundaries were determined. In the case of orthorhombic α′′, it was established that, besides the lattice parameters, the positions of the atoms on the (002)α′′planes respond very sensitively to the amount of Nb present.

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