Resin-impregnated bulk YBCO current leads for Maglev

Tomita, Masaru; Nagashima, K.; Murakami, Masato; Herai, Toshiki

doi:10.1016/s0921-4534(01)00425-7

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…The application fields of bulk superconductors will be greatly extended with the resin-impregnation technique, since this also enhances the resistance against corrosion as well as dramatically improving the mechanical properties. Recently, we developed current leads made of resin-impregnated bulk YBCO for Maglev [8]. The most difficult barrier for such applications was the effects due to mechanical vibration, which could be overcome with resin impregnation.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of bulk superconductors with resin impregnation

Tomita

Murakami

2002

Supercond. Sci. Technol.

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We have studied the mechanical properties of Y–Ba–Cu–O rods with and without resin impregnation using a three-point bending test. The specimens were cut from various locations with different orientations in a massive melt-grown block. There were slight differences in the flexural strengths in the Y–Ba–Cu–O rods depending on the location and the load direction. We have confirmed that the strengths of bulk YBCO can be enhanced by more than two times using resin impregnation. In addition, the enhancement of the mechanical strength at lower temperatures is greater in resin-impregnated samples, presumably due to a strong temperature dependence of the strength of the epoxy resin itself, which is also beneficial for practical applications of bulk samples with resin impregnation.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of bulk superconductors with resin impregnation

Tomita

Murakami

2002

Supercond. Sci. Technol.

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“…In case of melt-processed REBaCuO superconductors with a high at 77 K and high magnetic field, possible applications to railways are flywheels, motors, fault current limiter, actuators, and magnetic separation. In the Maglev system, superconducting bulk magnets [10]- [12], current leads [13] and magnetic shielding have been studied.…”

Section: Superconducting and Mechanical Properties Of Re-ba-cu-o/ag Bmentioning

confidence: 99%

Superconducting and Mechanical Properties of RE-Ba-Cu-O/Ag Bulk Superconductors

Fujimoto

2005

IEEE Trans. Appl. Supercond.

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Melt-processed REBaCuO (RE: rare earth) superconductors have a high at 77 K and a high magnetic field, which are expected to be used for high field applications such as superconducting permanent magnets with liquid nitrogen refrigeration, flywheels, current leads and so on. In this study, we discuss Ag-doped YBaCuO and SmBaCuO bulks melt-processed in air and their characteristic superconducting and mechanical properties. Isothermal undercooling growth in air with oxygen annealing and the Nd123/MgO thin film cold seeding technique were applied to seek a highly efficient process, homogeneity of composition, and feasibility of batch production. Single-domain growth of superconducting phases was achieved. The results of mechanical properties, e.g. flexural stress of REBaCuO bulk superconductors show the beneficial effect of Ag particles in the RE123 superconducting phase on strengthening and toughening the material. The results imply that the melt process is feasible for producing larger bulks in large-scale applications. Applications of superconducting technology to railways are also discussed.Index Terms-Flexural stress, melt process, REBaCuO high-temperature superconductors, trapped magnetic field.

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“…It is well known that one of the most promising applications is a superconducting magnet for magnetically levitated (Maglev) trains. SCMs for Maglev trains applying high-Tc superconductors would be a prospective design in the future [16][17][18][19] , as are current leads to supply power to the superconducting magnet 20) . Recent achievements include the high-temperature superconducting coil using Bi wires in a persistent current mode 21) .…”

Section: Electric Power T Electric Power T Electric Power T Electric mentioning

confidence: 99%

Railway Applications for High-Tc Superconductors

Fujimoto

2004

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Resin-impregnated bulk YBCO current leads for Maglev

Cited by 11 publications

References 9 publications

Mechanical properties of bulk superconductors with resin impregnation

Mechanical properties of bulk superconductors with resin impregnation

Superconducting and Mechanical Properties of RE-Ba-Cu-O/Ag Bulk Superconductors

Railway Applications for High-Tc Superconductors

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