科研之友
微信
新浪微博
Facebook
分享链接
摘要
The stress-strain properties of Bi-2223 tapes directly relate to its applications, but have not been systematically studied yet. Three tapes sheathed by Ag and Ag alloys were manufactured for the study of stress-strain. X-ray diffraction analyses were used to determine the amorphous and Bi-2223 phases for the three tapes before and after sintering. Tensile experiments were performed to study the stress-strain properties as well. Micro-morphologies of the three tapes were observed and recorded by scanning electron microscopy. The experimental results show green tapes with a linear stress-strain relation. It is suggested that this relation comes from the sheathed metal's properties. The mechanical properties of Ag/Mg sheathed tapes are like those of a rigid body, which do not present plasticity and elasticity. The phenomena of outgrowth and bridges were observed in Ag and Ag/Sb sheathed tapes. Also, Ag and Ag/Sb sheathed tapes showed abnormal stress-strain properties, which were subjected to micro-cracks existing in the sheathed metals and imperfections of Bi-2223 crystals.
- 出版日期2007-7
