Critical currents in Ag sheathed tapes of the 2223-phase in (Bi,Pb)-Sr-Ca-Cu-O

Flükiger, R.; Graf, Thomas; Decroux, M.; Groth, Corrado; Yamada, Yutaka

doi:10.1109/20.133413

Cited by 82 publications

(19 citation statements)

References 12 publications

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“…It should be noted that the relative intensities of the (00 l ) peaks of both tapes are not as high as those observed for the pressed precursor powder in figure 106 and show more random orientation. This is different from PIT processed Bi-2223/Ag tapes, in which the cycles of flat rolling and subsequent heat treatment produce stronger c -axis grain alignment due to the larger anisotropic morphology of the Bi-2223 crystal [499]. Our results for Ba-122/Ag tapes are also in contrast to the Fe-sheathed PIT Sr-122 tape [484, 489, 491], in which much stronger grain orientation was observed, similar to the Bi-2223 tape.…”

Section: Thin Films and Wires Of Iron-based Superconductorsmentioning

confidence: 94%

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

Hosono

Tanabe

Takayama‐Muromachi

et al. 2015

Science and Technology of Advanced Materials

205

190

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This review shows the highlights of a 4-year-long research project supported by the Japanese Government to explore new superconducting materials and relevant functional materials. The project found several tens of new superconductors by examining ∼1000 materials, each of which was chosen by Japanese experts with a background in solid state chemistry. This review summarizes the major achievements of the project in newly found superconducting materials, and the fabrication wires and tapes of iron-based superconductors; it incorporates a list of ∼700 unsuccessful materials examined for superconductivity in the project. In addition, described are new functional materials and functionalities discovered during the project.

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Section: Thin Films and Wires Of Iron-based Superconductorsmentioning

confidence: 94%

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

Hosono

Tanabe

Takayama‐Muromachi

et al. 2015

Science and Technology of Advanced Materials

205

190

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“…The influence of Ag in both YBa2Cu3OT (YBCO) and BSCCO tapes has been discussed by several groups [10][11][12][13][14][15][16][17][18]. It is widely believed that Ag positively encourages grain alignment in the Bi2Sr2CaCu2Oy (2212) and Bil.sPb0.4Sr2,0Ca2.2Cu3Ou (2223) compounds, but the mechanism by which this occurs is unclear in many respects.…”

Section: Introductionmentioning

confidence: 99%

Texture relationships and interface structure in Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O superconducting tapes

Feng

Larbalestier

1994

Interface Sci

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We have studied the phase composition, alignment, and bonding at the Ag/Bi-Sr-Ca-Cu-O (BSCCO) interface for silver-sheathed tapes of both the 2212 and 2223 compositions which have been processed under different conditions. Strong texturing of the (001) planes of the BSCCO phases parallel to the Ag interface was seen, regardless of the Ag orientation. Short facets of non-(001) BSCCO planes accommodate local misalignments between the Ag and the (001) planes of the BSCCO phases. Whether the 2212 composites are processed by complete melting or by sintering below the melting point, there is always a residual half-layer of 2201 at the interface. By contrast, 2223 composites exhibit 2223 layers right up to the interface without any transition phases. Both compounds bond strongly to Ag and cracks, when present, occur preferentially away from the interface.

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“…The grain alignment also seems to play a crucial role in the connectivity. It is noted that this rolling process is quite simple, similar to that developed for large scale production of Bi-2223 superconducting tapes in the early 1990s [28]. Inspired by the above texturing process, Gao et al [15] Ag-sheathed Ba-122 tapes.…”

Section: A Texturing Processmentioning

confidence: 99%

Development of high-performance iron-based superconducting wires and tapes

2015

Physica C: Superconductivity and its Applications

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Conventional powder-in-tube (PIT) method has been the most effective technique for fabricating iron-based superconducting wires and tapes. Tremendous advances have been made during the last few years, especially for 122 family pnictide tapes. Here we review some of the most recent and significant developments in making highperformance iron-based tapes by the ex-situ PIT process, paying particular attention to several fabrication techniques to realize high-field Jc performance in terms of increase of core density and improvement of texture. At 4.2 K, the practical level transport Jc up to 0.12 MA/cm 2 in 10 T and 0.1 MA/cm 2 in 14 T have been achieved in the K-doped 122/Ag tapes. As for multifilamentary 122 iron-based wires and tapes, the highest Jc values reached so far are 61 kA/cm 2 and 35 kA /cm 2 at 4.2 K and 10 T, respectively for 7-and 19-core Sr-122 tapes. Recently, high Jc Cu-cladded and stainless steel/Ag double-sheathed 122 tapes have also been produced in order to improve either mechanical properties or thermal stability. More importantly, the scalable rolling process has been used for the first time to demonstrate high Jc values in 122 conductor tapes of 11 m in length. PACS: 74.70.-b, 74.62.Bf Keywords: Iron-based wires and tapes High current density Jc Scalable rolling process 11 m long 122 tape

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Critical currents in Ag sheathed tapes of the 2223-phase in (Bi,Pb)-Sr-Ca-Cu-O

Cited by 82 publications

References 12 publications

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

Texture relationships and interface structure in Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O superconducting tapes

Development of high-performance iron-based superconducting wires and tapes

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