Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes

Shengchen Xue; Lingfeng Zhu; Jian Rong; Nghia Mai; Yi Li; Siwei Chen; Umesh Sambangi; Jithin Peram; Venkat Selvamanickam

doi:10.1109/TASC.2025.3547318

Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes

Shengchen Xue, Lingfeng Zhu, Jian Rong, Nghia Mai, Yi Li, Siwei Chen, Umesh Sambangi, Jithin Peram, Venkat Selvamanickam

Research output: Contribution to journal › Article › peer-review

Abstract

Rare earth barium copper oxide (REBCO) coated conductor tapes and cables are promising material candidates for high- power-density and highly efficient electric machines and high magnetic field applications. Enhancing the current sharing in between different strands/layers is one of the practical methods to improve the overall quench stability of a multi-strand cable or a no-insulation coil. In this work, we introduce the slot-and-fill (Slot-n-Fill) method to increase current sharing in REBCO tapes. Compared to the original tape, the Slot-n-Fill tape has slightly different bending retention performance, ∼7% lower irreversible tensile strength, and ∼5% lower I_c. However, the current sharing metric (CSM) in a 2-ply stack is improved from 1.025 in the control sample to 1.2 in the Slot-n-Fill tape stack.

Original language	English (US)
Article number	8400505
Journal	IEEE Transactions on Applied Superconductivity
Volume	35
Issue number	5
DOIs	https://doi.org/10.1109/TASC.2025.3547318
State	Published - 2025
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Keywords

Cables and current leads
Hts cables
mechanical properties
strain dependence
strain measurement
stress
superconducting tapes

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10.1109/TASC.2025.3547318

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title = "Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes",

abstract = "Rare earth barium copper oxide (REBCO) coated conductor tapes and cables are promising material candidates for high- power-density and highly efficient electric machines and high magnetic field applications. Enhancing the current sharing in between different strands/layers is one of the practical methods to improve the overall quench stability of a multi-strand cable or a no-insulation coil. In this work, we introduce the slot-and-fill (Slot-n-Fill) method to increase current sharing in REBCO tapes. Compared to the original tape, the Slot-n-Fill tape has slightly different bending retention performance, ∼7\% lower irreversible tensile strength, and ∼5\% lower Ic. However, the current sharing metric (CSM) in a 2-ply stack is improved from 1.025 in the control sample to 1.2 in the Slot-n-Fill tape stack.",

keywords = "Cables and current leads, Hts cables, mechanical properties, strain dependence, strain measurement, stress, superconducting tapes",

author = "Shengchen Xue and Lingfeng Zhu and Jian Rong and Nghia Mai and Yi Li and Siwei Chen and Umesh Sambangi and Jithin Peram and Venkat Selvamanickam",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2025",

doi = "10.1109/TASC.2025.3547318",

language = "English (US)",

volume = "35",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes

AU - Xue, Shengchen

AU - Zhu, Lingfeng

AU - Rong, Jian

AU - Mai, Nghia

AU - Li, Yi

AU - Chen, Siwei

AU - Sambangi, Umesh

AU - Peram, Jithin

AU - Selvamanickam, Venkat

PY - 2025

Y1 - 2025

N2 - Rare earth barium copper oxide (REBCO) coated conductor tapes and cables are promising material candidates for high- power-density and highly efficient electric machines and high magnetic field applications. Enhancing the current sharing in between different strands/layers is one of the practical methods to improve the overall quench stability of a multi-strand cable or a no-insulation coil. In this work, we introduce the slot-and-fill (Slot-n-Fill) method to increase current sharing in REBCO tapes. Compared to the original tape, the Slot-n-Fill tape has slightly different bending retention performance, ∼7% lower irreversible tensile strength, and ∼5% lower Ic. However, the current sharing metric (CSM) in a 2-ply stack is improved from 1.025 in the control sample to 1.2 in the Slot-n-Fill tape stack.

AB - Rare earth barium copper oxide (REBCO) coated conductor tapes and cables are promising material candidates for high- power-density and highly efficient electric machines and high magnetic field applications. Enhancing the current sharing in between different strands/layers is one of the practical methods to improve the overall quench stability of a multi-strand cable or a no-insulation coil. In this work, we introduce the slot-and-fill (Slot-n-Fill) method to increase current sharing in REBCO tapes. Compared to the original tape, the Slot-n-Fill tape has slightly different bending retention performance, ∼7% lower irreversible tensile strength, and ∼5% lower Ic. However, the current sharing metric (CSM) in a 2-ply stack is improved from 1.025 in the control sample to 1.2 in the Slot-n-Fill tape stack.

KW - Cables and current leads

KW - Hts cables

KW - mechanical properties

KW - strain dependence

KW - strain measurement

KW - stress

KW - superconducting tapes

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SN - 1051-8223

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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M1 - 8400505

ER -

Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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