Y-Ba-Cu-O Films Grown on Flexible Polycrystalline Substrates by Excimer Laser Ablation

Yoshida, Noriyuki; Kubota, Mari; Okuda, Shujiro; Takano, Satoshi; Nagata, M.; Hara, T.; Okaniwa, Kiyoshi; Yamamoto, Takashi

doi:10.1007/978-4-431-68141-0_201

Cited by 3 publications

(3 citation statements)

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“…Pulsed laser disposition (PLD) and chemical vapour deposition (CVD) have been favourably used to deposit Y-123 films on technical substrates [48][49][50][51][52]. These deposition techniques have several advantages: (1) good controllability of composite elements, (2) high oxygen-gas pressures (from 0.1 to 10 Torr) during deposition, and (3) high growth rates.…”

Section: Early Work On Y-123 Conductorsmentioning

confidence: 99%

“…(1) sufficient flexibility with proper mechanical tolerance, (2) suitable hardness to get a mirror-like flat surface, (3) heat durability in oxygen atmosphere at the growth temperatures of Y-123 films, (4) less chemical interaction with Y-123 films, (5) thermal expansion nearly equal to Y-123, and (6) low magnetism. Polycrystalline ceramic tapes were used as substrates in some early research [49]. Roll-milled Hastelloy C-276 tapes, a Ni-Cr superalloy with very strong heat strength, were the most popular substrates.…”

Section: Early Work On Y-123 Conductorsmentioning

confidence: 99%

“…Uniaxially aligned Y-123 films (c-axis ⊥ substrates) were easily grown on polycrystalline substrates, but the superconducting properties were heavily degraded at grain boundaries where the in-plane a-and b-axes misaligned quite randomly [48][49][50][51][52]. Because uniaxially aligned Y-123 films have intergranular weak links, the only way to obtain high J c is by forming a 'biaxially aligned structure' (both c-axes and a-b basal planes of all grains aligned, as shown in figure 1(b)) in Y-123 films.…”

Section: Early Work On Y-123 Conductorsmentioning

confidence: 99%

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High-temperature-superconductor coated conductors: technical progress in Japan

Iijima

Matsumoto

2000

Supercond. Sci. Technol.

101

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It is now a widespread view that a high-Jc superconducting wire with a high performance under strong magnetic fields at liquid-nitrogen temperature needs to be realized by the material Y-123. However, because of the weak linking nature of this material, the fabrication of the wire must be based on a coated-conductor process to achieve a highly textured Y-123 thin film on a long starting wire tape. Various attempts to obtain a textured substrate with sizable length have been made by various methods, with or without the aid of buffer layers. Approaches to the fabrication of an epitaxial thin film of Y-123 have also been made from vapour, liquid, or solid phases by different methods. Therefore, combinations of these proposed processes in each category have led to several promising on-going worldwide approaches to achieve the realization of practical coated superconducting wires in the near future. This review focuses on the most outstanding achievements in Japan.

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