YBCO superconductor tape adopts a laminated structure wrapped up with Cu stabilizer. This structure helps control the orientation of YBCO and realize a high critical current. Moreover, it cn endure high tensile strain of 0.5% without apparent degradation in superconductivity. However, the interface between the laminas is quite weak. Winded tape coil impregnated with resin often suffers from...
High-temperature superconducting magnetic energy storage systems (HTS SMES) have attracted significant attention for fast response and ensure a reliable power supply. However, the current carrying capacity of single superconducting tape often meets limitation for the large scale energy storage for HTS SMES applied in the power grid. Therefore, a composite superconductor with inherent helical...
YBCO tapes are subjected to various stresses such as tension, compression, bending, twisting and fatigue in practical application. The influence of mechanical fatigue on the critical current decay behavior has been studied by several research teams. The impact of background magnetic field on the critical current degradation under tensile fatigue loading, however, has been rarely investigated....
The fluorine-free metal organic decomposition (FF-MOD) is one of the most promising methods for preparing REBa2Cu3Oy (REBCO, RE: rare earth elements) coated conductors because the simple chemical reaction to form textured REBCO phases is completed in a short time without any necessity of vacuum chambers or high power laser devices. However, reproducibility is...
The trifluoroacetate metal-organic decomposition (TFA-MOD) process is a non-vacuum process. Therefore, this process for REBa2Cu3Oy (RE: rare earth) coated conductors (MOD-REBCO) is useful from a cost point of view. Recently, it has been reported that the critical current density (Jc) in liquid nitrogen temperature can be increased effectively by reducing once-coat-layer-thickness in the...
It is well known that the second generation high-temperature superconductor (HTS) tapes have local inhomogeneities of magnetic and current-carrying characteristics. These features of the material often limit the length of tape suitable for applications. The main purpose of present work is to improve the magnetic and transport characteristics of 2G HTS tapes by creating an ordered lattice of...
High temperature superconductors (HTSs) are developed for applications in HTS power devices such as power transmission cables, transformers, superconducting fault current limiters (SECLs) superconducting magnetic energy storage (SMES). Over-current performance of YBCO tapes at power frequency has been well studied by previous researches. However, in a power gird, superconducting apparatus...
In this work we have studied the critical properties of YBa2Cu3O7-δ thin films. The studied sample YBa2Cu3O7-δ is a monocristalline thin film deposited by the ablation laser method on the surface (001) of a SrTiO3 substrate. We have examined the variation of critical density Jc as a function of temperature for different values of a fixed magnetic field. This investigation shows that, in the...
We have proposed a method for effectively repairing locally defective or damaged HTS coated conductors produced during manufacturing HTS coated conductor or coil winding for magnet applications using superconducting patch. The superconducting patch was fabricated by separating the metal substrate from the commercial HTS coated conductor using the interface delamination phenomenon. And it has...
Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, Lanzhou The 2G HTS tapes have been widely used in the magnets, cables and superconducting magnetic energy storage (SMES) systems with its outstanding electromagnetic characteristics. As a typical multi-layer composite structure, the superconducting tape is delaminated easily by the...
This study is about the cooling of the superconducting wire by spraying the liquid nitrogen. In this study, the superconducting wire was cooled under the spray cooling condition, and a current flow test was conducted. In addition, the operating range of the superconducting wire was presented under the spray cooling condition of the liquid nitrogen. For this, a low temperature container with a...
In this report we present results of analysis of pinning force as well as pinning energy in PLD $GdBa_2 Cu_3 O_{7-x} $ coated conductors doped by $BaSnO_3$ and $BaZrO_3$. Concentrations of both additions in the studied samples have varied from 0 to 18 mole per cent. For all samples we measured magnetization curves in the range of temperature 4,2-77 K and magnetic field up to 14 T. Dependencies...
Many applications of YBCO tapes operate under external magnetic fields, hence it is necessary to investigate the in-field angular dependence of the critical current density of the coated conductors. In this paper, five commercial YBCO tapes with different microstructure that produced by three different manufacturers are chosen, which have width of 2mm, 4mm, 6 mm or 12mm. The in-field critical...
Sm1+xBa2Cu3+yO7-d (SmBCO) coated conductors were fabricated by reactive co-evaporation method in the EDDC (Evaporation using Drum in Dual Chambers) deposition chamber. The structure of SmBCO coated conductor was Ag/SmBCO/LMO/MgO/Y2O3/Al2O3/Hastelloy. The deposition system was composed of dual chambers: reaction chamber and evaporation chamber. Superconducting materials of Sm, Ba, and Cu were...
The superconduting tapes are widely used in fault current limiters for AC power systems. However, they are still in the study in the HVDC situation as it has a lot of differences compared with the AC situation. In the AC situation we have 45ms-60ms to shut down the circuit breaker so the current flows through the superconduting tape would be two or three times of the critical current of the...
There is a strong demand for higher field magnets in the various field of science. The development of solenoids capable of generating high magnetic fields of 20–30 T has been ongoing in major high-field laboratories in the worldwide. In the field of high energy accelerator, a 20 T dipole magnet is listed as a candidate for the bending magnet of the Future Circular Collider and the proposed...
