Effect of rolling reduction on the transport property, microstructure, phase formation and fill factor of high-Tc superconducting Bi-(Pb)-Sr-Ca-Cu-O tapes

Vo, N. V.; Dou, Shi Xue; Liu, Huan

doi:10.1016/s0011-2275(96)00021-5

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…For both types of processing techniques, RTP and CP, a decrease in the Bi2223 phase content at intermediate deformation ratios can be seen (figures 1 and 2). This trend is similar to that found in studies by Li [22] and Vo et al [23], who all studied the phase transformation of rolled tapes. In general the CP samples show a better Bi2223 content, in comparison to the RTP, over each time period and deformation ratio.…”

Section: Resultssupporting

confidence: 91%

“…Many of the studies have been based on the relation between the phase transformation process and the composition, atmosphere, temperature or time [14][15][16][17][18][19][20]. However, only a limited amount of study has been done concerning the effect of deformation on the transformation process [22,23]. The current work involved two different processing techniques.…”

Section: Introductionmentioning

confidence: 99%

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Phase transformation characteristics of BSCCO tapes processed via cryogenic and room temperature pressing

Cooper

Gao

et al. 2001

Supercond. Sci. Technol.

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The current investigation studies the phase transformation process of Bi-Sr-Ca-Cu-O (BSCCO) tapes processed by cryogenic, 77 K and room temperature pressing. The work specifically examined the effect of deformation on the phase content and transformation kinetics of the BSCCO tapes. The results showed that cryogenic pressing produced tapes with a higher Bi2223 phase content at lower deformation ratios than room temperature pressed tapes. However, the phase transformation profiles for both tapes were similar. A minimum phase content was observed in the profiles that was characteristic to each process. The minimum occurred between 30-40% deformation for the cryogenically pressed tapes and between 50-60% for the room temperature pressed tapes. The peculiar profiles were suggested to be the result of two competing mechanisms that reduced the free energy of the systems. It was suggested that these two mechanisms were either Bi2212 re-crystallization or Bi2223 phase formation. The differences observed between the two processes were attributed to the amount and way in which the deformation energy was transferred to the tape.

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Section: Resultssupporting

confidence: 91%