冷加工和热处理工艺对BiPbSrCaCuO/Ag复合超导带材微观结构和性能的影响

INFLUENCE OF COLD PROCESSING AND HEAT TREATING TECHNOLOGY ON MICROSTRUCTURE AND CRITICAL CURRENT DENSITY OF BiPbSrCaCuO/Ag COMPOSITE SUPER-CONDUCTING STRIP MATERIALS

摘要: 采用粉末装管加工技术(Powder-in-tube technique)制备了BiPbSrCaCuO/Ag(2223)复合高温超导带材。研究了冷加工工艺及热处理(烧结)工艺对带材微观结构和临界电流密度的影响。带材的微观结构和临界电流密度Jc值与冷加工变形量和烧结条件密切相关。拉拔、轧制的带材经单向压缩后Jc值显著提高。合理的烧结条件为:温度840~850℃,时间100~200h,冷却速率50~100℃/h。零磁场、77.3K下带材的最高临界电流密度Jc值为1.33×10⁸A/m²。
- 临界电流密度 /
- 复合超导带材
Abstract: BiPbSrCaCuO/Ag(2223) composite high temperature super-conducting strip materials have been prepared by powder-in-tube technique. The influence of cold processing and heat treating(sintering) technology on the microstructure and critical current density of strip materials have been studied. The microstructure and critical current density Jc value of strip materials are closely related with cold processing deformation and sintering condition. Jc value of drawn and roiled strips as obviously increased after single action pressing. Reasonable sintering condition is at 840~850℃ for 100~200h with a cooling rate of 50~100℃/h. Maximum critical currentdensity Jc under zero magnetic field at 77.3K is 1.33×10⁸A/m².
- composite high temperature super-conducting materials /
- critical curent density

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