Fracture toughness of SmBaCuO bulk superconductors at cryogenic temperatures

被引：6

作者：

Yoshino, Y

Iwabuchi, A

Takahashi, N

Katagiri, K

Noto, K

Sakai, N

Murakami, M

机构：

[1] Iwate Univ, Ueda, Nagano, Japan

[2] Iwate Ind Promot Ctr, Morioka, Iwate, Japan

[3] ISTEC, Superconduct Res Lab, Minato Ku, Tokyo 135, Japan

[4] Shibaura Inst Technol, Dept Mat Sci, Shibaura, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2004年 / 14卷 / 02期

关键词：

cryogenic temperatures; deformation mechanism; fracture toughness; Vickers hardness;

D O I：

10.1109/TASC.2004.830438

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Fracture toughness of Sm123 bulk superconductors with 16.7 and 28.6 mol% of Sm211 particles have been investigated by Vickers hardness test at cryogenic temperatures. The hardness test was carried out on (001) plane for two types of SmBCO bulk materials during 40-293 K. The hardness of Sm17 became constant to 5,000 MPa during 40-293 K. However, the hardness of Sm29 increased to 7,380 MPa with decreasing temperatures. In addition, fracture toughness of Sm17 and Sm29 will be discussed calculating from Vickers hardness, Median crack length, Young's modulus and applied load. The fracture toughness of Sm17 became constant to 0.8 MParootm following the hardness property. The fracture toughness of Sm29 decreased from 0.73 MParootm at 293 K to 0.67 MParootm at 40 K.

引用

页码：1118 / 1121

页数：4

共 18 条

[1] FRACTURE MECHANISMS OF CERAMIC COATINGS IN INDENTATION [J].