Influence of thermal cycling on the mechanical properties of VGF melt-textured YBCO

被引：86

作者：

Leenders, A ^{[1
]}

Ullrich, M ^{[1
]}

Freyhardt, HC ^{[1
]}

机构：

[1] ZENTRUM FUNKT WERKSTOFFE,D-37073 GOTTINGEN,GERMANY

来源：

PHYSICA C | 1997年 / 279卷 / 3-4期

关键词：

mechanical properties; YBCO; thermal cycling;

D O I：

10.1016/S0921-4534(97)00132-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hardness and fracture toughness of VGF melt-textured Y1Ba2Cu3O7-x are investigated as well as the influence of thermal cycling on these properties. The hardness is found to be load dependent. Introducing a true hardness, Ho, concept, leads to a load independent isotropic hardness, H-0 = 5.5-6.5 GPa. The fracture toughness, K-1C, is isotropic and amounts to 1.5-2.0 MPa root m. The absence of any anisotropy in K-1C can be ascribed to the homogeneous distribution of fine Y2Ba1Cu1O5 inclusions. Thermal cycling changes the measured hardness but does not affect the true hardness. After thermal cycling the fracture toughness drops substantially and the threshold for fracture decreases. (C) 1997 Elsevier Science B.V.

引用

页码：173 / 180

页数：8

共 36 条

[1] PHYSICAL AND MECHANICAL-PROPERTIES OF YBA2CU3O7-DELTA SUPERCONDUCTORS [J].