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Journal of the Korean Ceramic Society 1996;33(4): 471. |
| Billet 장입 방식을 이용 제조한 Bi(Pb)-Sr-Ca-Cu-O 초전도 선재의 특성 |
| 장건익, 유재근, 홍계원 |
| 한국원자력연구소 초전도 재료응용기술 개발 |
| Characteristics of Bi(Pb)-Sr-Ca-Cu-O Superconductor Wire Fabricated using the Billet Insertion Method |
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| ABSTRACT |
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During Bi(Pb)-Sr-Ca-Cu-O superconductor wire fabrication the effect of the initial packing density on the final characteristics of superconductor wire was systematically studied. To increase the powder packing density with uniform distribution of superconducting core a billet insertion method processed by CIP was applied instead of the commonly used vibration and ramming method of powder insertion into silver sheath. Compared with the vibration and ramming method the billent insertion technique processed by CIP cause the 30% incre-specimen with 130${mu}{textrm}{m}$(core thickness : 45 ${mu}{textrm}{m}$)and 5.24 mm width processed at 84$0^{circ}C$for 200hrs. shows specimen with 130${mu}{textrm}{m}$ (core thickness ; 45${mu}{textrm}{m}$)and 5.24 mm width processed at 84$0^{circ}C$ for 200 hrs. shows maximum 34A for Ic and 16, 700 A/cm2 for Ic measured at 77K and 0T. Also the sample rolled 3 times shows maximum 7, 2A for Ic and 11, 000 A/cm2 for 77K and 0T. Based on X-ray experimental results the formation of Bi-2223 and texture were significantly well developed at the interface between the superconducting core and silver sheath as compared with those of the interior area of superconducting core. |
| Key words:
Powder-in-tube, Vibration and ramming, billet, Powder packing density |
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