中间变形对Bi-2223/Ag超导带材织构的影响  

Effect of Intermediate Deformation on the Texturing of Bi-2223/Ag Tapes

作　　者：林东[1] 易汉平[1] 宋秀华 刘伟[1] 刘庆[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]北京英纳超导技术有限公司,北京100176

出　　处：《金属热处理》2004年第8期1-4,共4页Heat Treatment of Metals

基　　金：科技部项目 ( 2 0 0 2AA3 0 6113 )

摘　　要：借助于扫描电镜和X射线衍射分析摇摆曲线 ,研究了Bi 2 2 2 3/Ag单芯超导带材制备过程中中间变形对Bi 2 2 2 3超导相织构的影响。结果表明 ,织构度与中间变形量的关系曲线呈现峰值变化规律。采用轧制进行中间变形 ,Bi 2 2 2 3/Ag单芯带材的变形量εopt为 14 3%时Bi 2 2 2 3相织构最佳 ;采用压制进行中间变形 ,变形量εopt为10 7%时Bi 2 2 2 3相织构最佳。中间变形后的带材经过最终热处理 ,其Bi 2 2 2 3相的织构得到进一步改善。四引线法临界电流密度测量结果表明 。The effect of intermediate deformation (ID) on texturing of Bi-2223 phase was studied during the manufacturing process of Bi-2223/Ag monofilamentary tapes,by means of SEM and XRD rocking curve.The results show that there exists a peak value for the degree of texturing as a function of ID reduction.The optimum reduction for intermediate rolling and intermediate pressing is 14.3% and 10.7%,respectively.The texturing of the Bi-2223 phase was further improved by the final heat treatment after ID.Moreover,critical current density of the tapes measured using standard four-terminal techniques was directly proportional to the texturing of the Bi-2223 phase.

关 键 词：BI-2223/AG超导带材 Bi-2223超导相 中间变形 X射线衍射分析摇摆曲线 

分 类 号：TM26[一般工业技术—材料科学与工程]