新型Bi系高温超导用银合金力学性能研究  

STUDY ON THE MECHANICAL PROPERTY OF AgMgV ALLOYS USED IN BSCCO TAPES

作　　者：梁婷[1] 赵亮[1] 李霈[1] 韩征和[1] 

机构地区：[1]清华大学物理系应用超导研究中心

出　　处：《低温物理学报》2005年第A01期723-727,共5页Low Temperature Physical Letters

摘　　要：为开发新型Bi系高温超导用银合金,使其具有良好的机械性能,我们制备了Ag Mg0.05V0.05和Ag Mg0.10V0.075合金,研究了这两种合金经过不同条件退火处理后的室温拉伸性能.实验结果表明,合金化对提高材料的强度有显著效果;由光学金相照片观察到,银合金经过空气气氛退火后,形成了氧化物析出相,使强度进一步提高.Ag Mg0.05V0.05合金经820℃、40h空气退火处理后,屈服强度和抗拉强度分别高达110MPa和217MPa,克服了Ag MgNi合金在较高温度退火强度下降的缺点.获得在高温长时处理后保持高强度的包套合金材料,对提高超导带材的机械强度和传输性能以及工程上的应用具有重要的意义.Ag-Mg alloys doped with V alloys has been investigated in order to develop new sheath alloys used in BSCCO tapes. The mechanical properties of these alloys have been measured, including the fracture and yield strength and strain. The strengthening mechanisms are been discussed followed in order to found the effect of the doped elements on the mechanical property. It was found that the addition of a small quantity of V increased the strength significantly due to dispersion hardening. The best results are achieved, so far, for the samples of AgMg0.05V0.05, especially being treated in air at 820℃ for 40h. The values are 110MPa and 216MPa, being the highest yield and fracture strength. The optical microstructure of silver alloys was also presented in this paper.

关 键 词：Bi系高温超导 银合金 拉伸性能 

分 类 号：O511.3[一般工业技术—材料科学与工程]