An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using vickers hardness test at cryogenic temperatures

Y. Yoshino; A. Iwabuchi; K. Katagiri; K. Noto; N. Sakai; M. Murakami

doi:10.1109/TASC.2002.1018747

An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using vickers hardness test at cryogenic temperatures

Y. Yoshino, A. Iwabuchi, K. Katagiri, K. Noto, N. Sakai, M. Murakami

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

11 Citations (Scopus)

Abstract

Vickers hardness properties of bulk superconductors have been investigated to estimate the mechanical properties of bulk materials. However, the test at cryogenic temperatures had not been conducted at all. Then we conducted Vickers hardness test on (001) plane of YBaCuO and (Sm,Gd)BaCuO bulk superconductors from 40 to 293 K. The hardness of YBaCuO and (Sm,Gd)BaCuO increased with decreasing temperature up to 19 000 MPa and 10 000 MPa, respectively. Furthermore, the cracks caused by the indentation were observed with SEM, and the fracture toughness K IC at cryogenic temperatures was calculated. The K IC of YBaCuO and (Sm,Gd)BaCuO decreased with decreasing temperature to 0.6 MPa√m and 0.8 MPa√m, respectively.

Original language	English
Pages (from-to)	1755-1758
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	12
Issue number	1
DOIs	https://doi.org/10.1109/TASC.2002.1018747
Publication status	Published - 2002 Mar 1
Externally published	Yes
Event	17th Annual Conference on Magnet Technology - Geneva, Switzerland Duration: 2001 Sep 24 → 2001 Sep 28

Keywords

Cryogenic temperatures
Deformations mechanism
Fracture toughness
Vickers hardness

ASJC Scopus subject areas

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

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An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using vickers hardness test at cryogenic temperatures. / Yoshino, Y.; Iwabuchi, A.; Katagiri, K.; Noto, K.; Sakai, N.; Murakami, M.

In: IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, 01.03.2002, p. 1755-1758.

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

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AU - Yoshino, Y.

AU - Iwabuchi, A.

AU - Katagiri, K.

AU - Noto, K.

AU - Sakai, N.

AU - Murakami, M.

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AB - Vickers hardness properties of bulk superconductors have been investigated to estimate the mechanical properties of bulk materials. However, the test at cryogenic temperatures had not been conducted at all. Then we conducted Vickers hardness test on (001) plane of YBaCuO and (Sm,Gd)BaCuO bulk superconductors from 40 to 293 K. The hardness of YBaCuO and (Sm,Gd)BaCuO increased with decreasing temperature up to 19 000 MPa and 10 000 MPa, respectively. Furthermore, the cracks caused by the indentation were observed with SEM, and the fracture toughness K IC at cryogenic temperatures was calculated. The K IC of YBaCuO and (Sm,Gd)BaCuO decreased with decreasing temperature to 0.6 MPa√m and 0.8 MPa√m, respectively.

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