In situ observations of crack formation in multi-filament Bi-2223 HTS tapes

Bent F. Sørensen; Andy Horsewell; P. Skov-Hansen

doi:10.1016/S0921-4534(02)00964-4

In situ observations of crack formation in multi-filament Bi-2223 HTS tapes

Bent F. Sørensen, Andy Horsewell, P. Skov-Hansen

NKT Group

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

High temperature superconducting tapes (BSCCO filaments embedded in Ag) were subjected to Uniaxial tension in an environmental scanning electron microscope, allowing in situ observation of cracking of the ceramic filaments. The first cracks were found to appear in the ceramic filaments at a strain around 0.15%, More cracks formed with increasing strain. The cracks covered the entire thickness of the filament. but did not Continue into the surrounding (ductile) Ag matrix. These 'tunnel cracks' appeared somewhat zigzag, indicating intergranular cracking mode. At low strains, crack blunting occurred at the ceramic/Ag interfaces of the tunnel cracks, At higher strain 'split cracks' formed at the tunnel cracks. The split cracks ran parallel with the ceramic/Ag interface just inside the ceramic layer.

Original language	English
Journal	Physica C, Superconductivity
Volume	372-376
Issue number	2
Pages (from-to)	1032-1035
ISSN	0921-4534
DOIs	https://doi.org/10.1016/S0921-4534(02)00964-4
Publication status	Published - 2002

Keywords

cracks
in situ
HTS tape
BSCCO

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title = "In situ observations of crack formation in multi-filament Bi-2223 HTS tapes",

abstract = "High temperature superconducting tapes (BSCCO filaments embedded in Ag) were subjected to Uniaxial tension in an environmental scanning electron microscope, allowing in situ observation of cracking of the ceramic filaments. The first cracks were found to appear in the ceramic filaments at a strain around 0.15%, More cracks formed with increasing strain. The cracks covered the entire thickness of the filament. but did not Continue into the surrounding (ductile) Ag matrix. These 'tunnel cracks' appeared somewhat zigzag, indicating intergranular cracking mode. At low strains, crack blunting occurred at the ceramic/Ag interfaces of the tunnel cracks, At higher strain 'split cracks' formed at the tunnel cracks. The split cracks ran parallel with the ceramic/Ag interface just inside the ceramic layer.",

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T1 - In situ observations of crack formation in multi-filament Bi-2223 HTS tapes

AU - Sørensen, Bent F.

AU - Horsewell, Andy

AU - Skov-Hansen, P.

PY - 2002

Y1 - 2002

N2 - High temperature superconducting tapes (BSCCO filaments embedded in Ag) were subjected to Uniaxial tension in an environmental scanning electron microscope, allowing in situ observation of cracking of the ceramic filaments. The first cracks were found to appear in the ceramic filaments at a strain around 0.15%, More cracks formed with increasing strain. The cracks covered the entire thickness of the filament. but did not Continue into the surrounding (ductile) Ag matrix. These 'tunnel cracks' appeared somewhat zigzag, indicating intergranular cracking mode. At low strains, crack blunting occurred at the ceramic/Ag interfaces of the tunnel cracks, At higher strain 'split cracks' formed at the tunnel cracks. The split cracks ran parallel with the ceramic/Ag interface just inside the ceramic layer.

AB - High temperature superconducting tapes (BSCCO filaments embedded in Ag) were subjected to Uniaxial tension in an environmental scanning electron microscope, allowing in situ observation of cracking of the ceramic filaments. The first cracks were found to appear in the ceramic filaments at a strain around 0.15%, More cracks formed with increasing strain. The cracks covered the entire thickness of the filament. but did not Continue into the surrounding (ductile) Ag matrix. These 'tunnel cracks' appeared somewhat zigzag, indicating intergranular cracking mode. At low strains, crack blunting occurred at the ceramic/Ag interfaces of the tunnel cracks, At higher strain 'split cracks' formed at the tunnel cracks. The split cracks ran parallel with the ceramic/Ag interface just inside the ceramic layer.

KW - cracks

KW - in situ

KW - HTS tape

KW - BSCCO

U2 - 10.1016/S0921-4534(02)00964-4

DO - 10.1016/S0921-4534(02)00964-4

M3 - Journal article

SN - 0921-4534

VL - 372-376

SP - 1032

EP - 1035

JO - Physica C, Superconductivity

JF - Physica C, Superconductivity

IS - 2

ER -

In situ observations of crack formation in multi-filament Bi-2223 HTS tapes

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Keywords

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