scholarly journals Stress Dependence of Seebeck Coefficient in Iron-Based Amorphous Ribbons

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2814 ◽  
Author(s):  
Michał Nowicki
Keyword(s):  
Tensile Stress ◽  
Seebeck Coefficient ◽  
Test Stand ◽  
Stress Dependence ◽  
Amorphous Ribbons ◽  
Ferromagnetic Alloys ◽  
Iron Based ◽  
Relative Change ◽  
Stress Influence

The results of an investigation on tensile stress dependence of mean Seebeck coefficient in Fe-based amorphous ribbons are presented, constituting a new Seebeck-sigma effect. A measurement test stand, capable of the determination of small variations in thermopower in such materials under stress is described. Exemplary results for commercially available, positively magnetostrictive SA1 and 2605CO amorphous ribbons show significant stress dependence with more than 1% of relative change, in contrast to negatively magnetostrictive 6030D alloys with 0.1% change. Non-ferromagnetic alloys are tested for comparison purposes, giving negligible results. Thus, the possibility of a magnetomechanical mechanism of the stress influence is proposed.

scholarly journals Stress Dependence of the Small Angle Magnetization Rotation Signal in Commercial Amorphous Ribbons

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2908 ◽  
Author(s):  
Michał Nowicki
Keyword(s):  
Tensile Stress ◽  
Small Angle ◽  
Force Sensor ◽  
Stress Dependence ◽  
Soft Magnetic ◽  
Magnetization Rotation ◽  
Amorphous Ribbons ◽  
Supply Current ◽  
Rotation Signal

The results of the investigation on tensile stress dependence of the SAMR (small angle magnetization rotation) signal in soft magnetic amorphous ribbons are presented. Exemplary results for commercially available, negatively magnetostrictive 2705M, 2714A, and 6030D amorphous ribbons show significant stress dependence, in contrast to positively magnetostrictive 2826MB alloy. The magnetoelastic hysteresis of the obtained characteristics is compared, as well as the influence of the biasing H field and supply current variations. Based on the results, 2705M alloy with near-zero negative magnetostriction is proposed as best suited for a SAMR-based, magnetoelastic force sensor.

Tensile-stress dependence of magnetostriction in multilayers of amorphous ribbons

1990 ◽  
Vol 42 (10) ◽  
pp. 6471-6475 ◽  
Author(s):  
A. Hernando ◽  
C. Gomez-Polo ◽  
E. Pulido ◽  
G. Rivero ◽  
M. Vazquez ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Stress Dependence ◽  
Amorphous Ribbons

Does Seebeck Coefficient of Single Molecule Junctions Depend on the Junction Configuration?

2021 ◽  
Author(s):  
František Vavrek ◽  
Olena Butsyk ◽  
Viliam Kolivoska ◽  
Stepanka Lachmanova ◽  
Táňa Sebechlebská ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Experimental Method ◽  
Simultaneous Determination ◽  
Thermoelectric Properties ◽  
Single Molecule ◽  
Single Molecule Level ◽  
Single Molecule Junctions

New experimental method for simultaneous determination of electric and thermoelectric properties of metal‒molecule‒metal junctions at the single molecule level have been developed to test the effect of the junction configuration...

Determination of the Flow Field in LP Steam Turbines

1986 ◽  
Author(s):  
J. Wachter ◽  
G. Eyb
Keyword(s):  
Flow Field ◽  
Measuring Equipment ◽  
Short Description ◽  
Test Stand ◽  
Steam Turbines ◽  
Flow Conditions ◽  
Flow Measurements ◽  
Last Stage ◽  
The University

Up to now the determination of flow conditions across the entire circumference in LP steam turbines appears to be a difficult undertaking. The difficulties are mainly caused by the condensing medium steam and by the limited access to the stage from outside. The Last Stage Test Stand at the University of Stuttgart is a suitable facility for flow measurements in the LP part of steam turbines. Besides a short description of the test stand itself, the measuring equipment and the newly developed methods for data acquisition and evaluation are presented. Finally the flow field behind the last stage is shown and the results interpreted.

Investigation of Rotational Relaxation by Double Resonance and Stark Switch Techniques

1980 ◽  
Vol 35 (8) ◽  
pp. 832-840
Author(s):  
W. Schrepp ◽  
H. Dreizler ◽  
A. Guarnieri
Keyword(s):  
Double Resonance ◽  
Relaxation Times ◽  
Experimental Methods ◽  
Rotational Relaxation ◽  
Triple Resonance ◽  
Static Electric Field ◽  
First Order ◽  
Four Levels ◽  
Relative Change

Abstract For the four rotational levels JK₋K₊ = 101, 110,212 and 221 of ethylene oxide all possible four level double resonance experiments for dipole allowed transitions have been performed to investigate collisional effects and to determine the relative change of signal intensity, η = ⊿I/I, due to high power pump radiation. The T1 and T2-relaxation times have been measured for all dipole allowed transitions within these four levels. A combination of the data obtained from both experimental methods allows the determination of rate and bath constants taking into account only first order dipolar transitions. No further restrictions have been used. This approximation is supported by a triple resonance experiment. In addition to the pure gas investigation in the absence of external fields, rotational relaxation has been studied in the presence of a static electric field and in a mixture with hydrogen.

Determination of DC06+ZE Sheet Crack Cause

2016 ◽  
Vol 368 ◽  
pp. 121-125
Author(s):  
Pavel Kejzlar ◽  
Tomáš Pilvousek ◽  
Michal Tregler
Keyword(s):  
Stress Concentration ◽  
Tensile Stress ◽  
Deep Drawing ◽  
Crack Formation ◽  
Local Stress ◽  
Local Deformation ◽  
Local Stress Concentration ◽  
Bcc Lattice ◽  
Hard Particles

The present work deals with determination of the cause of crack occurring in a part of car body manufactured from deep-drawing sheet. UHR-SEM, EDS, EBSD and measurement of microhardness were used for evaluation of the structure, local deformation and crack formation mechanism. A material analysis discovered foreign particles in the material. These particles were identified as MgAl2O4 with BCC lattice. The occurrence of these hard particles led to local stress concentration, decrease in mechanical strength and sheet breach due to tensile stress during deformation.

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