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

研究成果: Conference article査読

11 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1755-1758
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
12
1
DOI
出版ステータスPublished - 2002 3月
外部発表はい
イベント17th Annual Conference on Magnet Technology - Geneva, Switzerland
継続期間: 2001 9月 242001 9月 28

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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