Top-seeded infiltration growth of Y–Ba–Cu–O bulk superconductors

Umakoshi, S.; Ikeda, Yoshitaka; Wongsatanawarid, A.; Kim, C.-J.; Murakami, Masato

doi:10.1016/j.physc.2011.05.070

Cited by 18 publications

(9 citation statements)

References 8 publications

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“…In addition, the trapped field is about 0.4 T (77 K, 0.5 T magnetized by permanent magnets) for the sample S4 fabricated using the new RE+011 TSIG method, which is also much higher than the 0.129 T of the single domain of YBCO bulks fabricated using the conventional TSIG process [33]. In order to clarify why the higher levitation force of 49.2 N and trapped field of 0.4 T are obtained in sample S4 fabricated using the new RE+011 TSIG method, and why the lower levitation force of 23 N [32] and trapped field of 0.129 T [33] are measured in the single domain of YBCO bulks fabricated using the conventional TSIG process, the microstructure of the sample was investigated using scanning electron microscopy (SEM) and shown in figure 4.…”

Section: Resultsmentioning

confidence: 90%

A new RE + 011 TSIG method for the fabrication of high quality and large size single domain YBCO bulk superconductors

Yang¹,

Chen²,

Wang

2015

Supercond. Sci. Technol.

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High quality single domain YBCO bulk superconductors, 20 mm in diameter, have been fabricated using a new top seeded infiltration and growth method (called the RE + 011 TSIG method), with a new solid phase (Y2O3 + xBaCuO2) instead of the conventional Y2BaCuO5 solid phase, x = 0, 0.5, 1.0, 1.2, 1.5, 1.8, 2.0, 2.5, 3.0. The effects of different BaCuO2 contents x on the growth morphology, microstructure, and levitation force have been investigated. The results show that the levitation force of the YBCO bulks first increases and then decreases with increasing x, and reaches maximum levitation forces of about 49.2 N (77 K, 0.5 T, with the traditional liquid phase of YBa2Cu3Oy + 3 BaCuO2 + 2 CuO) and 47 N (77.3 K, 0.5 T, with the new liquid phase of Y2O3 + 10 BaCuO2 + 6 CuO) when x = 1.2, which is much higher than that of the samples fabricated with the conventional solid phases (23 N). The average Y2BaCuO5 particle size is about 1 μm, which is much smaller than the 3.4 μm in the samples prepared with the conventional Y2BaCuO5 solid phase; this means that the flux pinning force of the sample can be improved by using the new solid phase. Based on this method, single domain YBCO bulks 40 mm, 59 mm, and 93 mm in diameter have also been fabricated using the TSIG process with the new solid phases (Y2O3 + 1.2BaCuO2). These results indicate that the new TSIG process developed by our lab is a very important and practical method for the fabrication of low cost, large size, and high quality single domain REBCO bulk superconductors.

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Section: Resultsmentioning

confidence: 90%

A new RE + 011 TSIG method for the fabrication of high quality and large size single domain YBCO bulk superconductors

Yang¹,

Chen²,

Wang

2015

Supercond. Sci. Technol.

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“…The two most common methods are top-seeded melt growth (TSMG) and top-seeded infiltration growth (TSIG). 14 In the TSMG method, precursor powder is pressed into a disc, on top of which a seed is placed. 15 During the subsequent heat treatment process above its peritectic temperature, the RE-123 phase decomposes to RE-211 and LP (liquid phase, Ba 3 Cu 5 O 8 ).…”

Section: Introductionmentioning

confidence: 99%

Novel chemical recycling process of REBCO materials showcased on TSMG-processed waste

Sklenka,

Jankovský,

Hlásek

et al. 2024

J. Mater. Chem. C

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“…Single domain RE-Ba-Cu-O (REBCO, where RE is a rare earth element, such as Y, Gd, Nd, Sm, etc) bulk superconductors have a significant potential for use in various applications, such as magnetic bearings, magnetic separators, motors, flywheels, portable magnetic resonance imaging, energy storage systems, self-limiting transformer and levitated transportation systems [1][2][3][4][5][6][7] because of their strong pinning flux energy, high critical temperature and good selfstable levitation performance. The top-seeded infiltration and growth (TSIG) process has been widely used to fabricate REBCO bulk superconductors due to its prominent advantages [8,9]. But the traditional TSIG method is relatively more complicated and time consuming because it needs three kinds of precursor powders, such as REBa 2 Cu 3 O y (RE-123), RE 2 BaCuO 5 (RE-211) and Ba 3 Cu 5 O 8 (035).…”

Section: Introductionmentioning

confidence: 99%

Novel configurations for the fabrication of high quality REBCO bulk superconductors by a modified RE + 011 top-seeded infiltration and growth process

Yang¹,

Yang²,

Zhang³

et al. 2018

Supercond. Sci. Technol.

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Single domain REBCO bulk superconductors can be fabricated by the top-seeded infiltration and growth (TSIG) process, but there are some problems with removing the residual liquid phase from the bulks after crystal growth. The superconducting bulks fabricated by the TSIG process are generally obtained by slicing or polishing the REBCO bulks, which may produce cracks in the samples. In order to solve these problems, we proposed two novel configurations to prevent the REBCO bulks fusing together with the residual liquid phase by introducing transport layers or bars between the solid phase pellets and the liquid phase pellets. It is found that the REBCO bulks fabricated by the RE+011 TSIG process can be easily separated from the residual liquid phase by using new configurations. We have also fabricated GdBCO bulks with 1 wt% CeO 2 addition using the novel configuration. The CeO 2 doping GdBCO bulk with diameter of 20 mm exhibits a very good trapped field of 1.110 T and levitation force of 54.5 N at 77 K. The results indicate that this is not only a good way to fabricate high quality single domain REBCO bulks, but also an important way to fabricate near net shape REBCO bulks without any mechanical process.

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Top-seeded infiltration growth of Y–Ba–Cu–O bulk superconductors

Cited by 18 publications

References 8 publications

A new RE + 011 TSIG method for the fabrication of high quality and large size single domain YBCO bulk superconductors

A new RE + 011 TSIG method for the fabrication of high quality and large size single domain YBCO bulk superconductors

Novel chemical recycling process of REBCO materials showcased on TSMG-processed waste

Novel configurations for the fabrication of high quality REBCO bulk superconductors by a modified RE + 011 top-seeded infiltration and growth process

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