scholarly journals Influence of oxygen content and structural defects on low-temperature mechanical properties of high-temperature superconducting single crystals and ceramics

1997 ◽  
Vol 23 (8) ◽  
pp. 678-683 ◽  
Author(s):  
S. V. Lubenets ◽  
V. D. Natsik ◽  
L. S. Fomenko ◽  
H.-J. Kaufmann ◽  
V. S. Bobrov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Single Crystals ◽  
Oxygen Content ◽  
Structural Defects ◽  
High Temperature Superconducting

Superconducting Wind Generators with Capacities of 10 MW and Larger

2020 ◽  
Vol 10 (10) ◽  
pp. 59-67
Author(s):  
Victor N. ANTIPOV ◽  
◽  
Andrey D. GROZOV ◽  
Anna V. IVANOVA ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Wind Power ◽  
State Of The Art ◽  
Superconducting Materials ◽  
Commercial Application ◽  
Synchronous Generators ◽  
High Temperature Superconducting ◽  
Wind Generators ◽  
Main Factor

The overall dimensions and mass of wind power units with capacities larger than 10 MW can be improved and their cost can be decreased by developing and constructing superconducting synchronous generators. The article analyzes foreign conceptual designs of superconducting synchronous generators based on different principles: with the use of high- and low-temperature superconductivity, fully superconducting or only with a superconducting excitation system, and with the use of different materials (MgB2, Bi2223, YBCO). A high cost of superconducting materials is the main factor impeding commercial application of superconducting generators. In view of the state of the art in the technology for manufacturing superconductors and their cost, a conclusion is drawn, according to which a synchronous gearless superconducting wind generator with a capacity of 10 MW with the field winding made of a high-temperature superconducting material (MgB2, Bi-2223 or YBCO) with the «ferromagnetic stator — ferromagnetic rotor» topology, with the stator diameter equal to 7—9 m, and with the number of poles equal to 32—40 has prospects for its practical use in the nearest future.

Electron microscopic investigations of neutron irradiated YBa2Cu3O7-x high temperature superconducting single crystals

1991 ◽  
Vol 77 (4) ◽  
pp. 259-263 ◽  
Author(s):  
Ram Janam ◽  
K. Ramakrishna ◽  
O.N. Srivastava ◽  
B.A. Dasannacharya ◽  
P.R. Vijayaraghavan
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
Electron Microscopic ◽  
High Temperature Superconducting ◽  
Microscopic Investigations

Low-temperature anomalies of mechanical properties in Zn-Cu-Ti single crystals

2017 ◽  
Vol 690 ◽  
pp. 254-258 ◽  
Author(s):  
Grzegorz Boczkal ◽  
Paweł Pałka ◽  
Bartosz Sułkowski ◽  
Borys Mikułowski
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Single Crystals ◽  
Temperature Anomalies

Influence of Al-Cu-Mn-Fe-Ti Alloy Composition and Production Parameters of Extruded Semi-Finished Products on their Structure and Mechanical Properties

2017 ◽  
Vol 265 ◽  
pp. 456-462 ◽  
Author(s):  
P.L. Reznik ◽  
Mikhail Lobanov
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Thermal Treatment ◽  
Low Temperature ◽  
Room Temperature ◽  
High Temperature Strength ◽  
Ti Alloy ◽  
Low Temperature Annealing ◽  
Annealing Conditions ◽  
Concentration Changes

Studies have been conducted as to the effect of Cu, Mn, Fe concentration changes in Al-Cu-Mn-Fe-Ti alloy, the conditions of thermal and deformational treatment of ingots and extruded rods 40 mm in diameter on the microstructure, phase composition and mechanical properties. It has been determined that changing Al-6.3Cu-0.3Mn-0.17Fe-0.15Ti alloy to Al-6.5Cu-0.7Mn-0.11Fe-0.15Ti causes an increase in the strength characteristics of extruded rods at the room temperature both after molding and in tempered and aged conditions, irrespective of the conditions of thermal treatment of the initial ingot (low-temperature annealing 420 °С for 2 h, or high-temperature annealing at 530 °С for 12 h). Increasing the extruding temperature from 330 to 480 °С, along with increasing Cu, Mn and decreasing Fe in the alloy Al-Cu-Mn-Ti, is accompanied by the increased level of ultimate strength in a quenched condition by 25% to 410 MPa, irrespective of the annealing conditions of the original ingot. An opportunity to apply the Al-6.3Cu-0.3Mn-0.17Fe-0.15Ti alloy with low-temperature annealing at 420 °С for 2 h and the molding temperature of 330 °С has been found to produce rods where, in the condition of full thermal treatment (tempering at 535 °С + aging at 200 °С for 8 hours), a structure is formed that ensures satisfactory characteristics of high temperature strength by resisting to fracture for more than 100 hours at 300 °С and 70 MPa.

Model for the low-temperature transport of Bi-based high-temperature superconducting tapes

1992 ◽  
Vol 45 (5) ◽  
pp. 2545-2548 ◽  
Author(s):  
L. N. Bulaevskii ◽  
J. R. Clem ◽  
L. I. Glazman ◽  
A. P. Malozemoff
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Superconducting Tapes ◽  
High Temperature Superconducting

Experimental Research on Mechanical Properties of Polypropylene Flexible Intermediate Bulk Container Base Materials

2013 ◽  
Vol 811 ◽  
pp. 146-151
Author(s):  
Chen Wei Chen ◽  
Fu Xin Yang ◽  
Li Xin Lu ◽  
Jin Xie ◽  
Li Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Low Temperature ◽  
Base Material ◽  
Powder Materials ◽  
Base Materials ◽  
Natural Exposure ◽  
Exposure Experiment ◽  
Tensile Experiment

The Flexible Intermediate Bulk Container (FIBC) is a flexible transportation packaging container that is weaved by polyolefin plastic ribbon-like filament, which is widely used in the storage and transportation of granular and powder materials. When the FIBC was affected by environment factors synthetically under using, such as light, heat and air etc, it would come into degradation and its mechanical properties reduced. In this study, the basic mechanical properties of polypropylene FIBC base material were tested by tensile experiment and the reason of main base material mechanical properties difference between theoretical value and experimental value was analyzed. Based on the FIBC different using environments, the natural exposure experiment and high/low temperature experiments were carried out, we took tensile strength holding ratio and elongation holding ratio as evaluating indicator and analyzed law of influence of the different experiment condition on base material mechanical properties, which provided valuable reference for FIBC designing and manufacturing. Along with the experiment time increased, the color of base material changed from milk white to yellow slowly, the tensile strength and elongation reduced, the influencing grade was as follow: natural exposure>high temperature>low temperature. The results of natural exposure experiment showed that there was difference of anti-aging performance among the FIBC base material, the mechanical properties of woof fabric and belt reduced evidently, while others reduced slowly. For high (45°C)/low (-25°C) temperature experiments, the reduction of FIBC base materials mechanical properties were not obvious and woof fabric reduced a little faster comparatively.

Quality of high temperature superconducting poly- and single crystals in relation to their critical dynamic field

Cryogenics ◽  
1990 ◽  
Vol 30 (7) ◽  
pp. 623-627 ◽  
Author(s):  
B. Loegel ◽  
A. Mehdaoui ◽  
D. Bolmont ◽  
A. Eckhardt ◽  
F. Muller
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
High Temperature Superconducting ◽  
Dynamic Field ◽  
Critical Dynamic
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