ORIENTED STRUCTURE AND SUPERCONDUCTING PROPERTIES IN DENSE Y1BA2CU3 OXIDES PREPARED BY PRESS FORGING

被引：7
作者：
MATSUZAKI, K
INOUE, A
MASUMOTO, T
机构：
[1] Institute for Materials Research, Tohoku University, Sendai, 980
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1990年 / 29卷 / 10期
关键词：
Densification; Grain orientation; High-Tc superconductor; Hot-working; Press forging method; Y[!sub]1[!/sub]Ba[!sub]2[!/sub]Cu[!sub]3[!/sub]oxide;
D O I：
10.1143/JJAP.29.L1789
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Dense Y1Ba2Cu3oxides with a highly oriented structure were prepared by press forging at temperatures above 1248 K in air. The c plane of the oxides is preferentially oriented perpendicular to the pressing direction, and the orientation factor (F) and density attained by press forging at 1273 K are 0.58 and 6.19 Mg/m3, respectively. Subsequent annealing treatment for 36 h at 1173 K and for 200 h at 773 K in O2for the press forged oxides causes a high-Tcsuperconductivity with Tcof 90 K and Jcof 800 A/cm2at 77 K in zero field. The Jcvalue seems to be attributed to the highly oriented and densified structure. © 1990 IOP Publishing Ltd.
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页码：L1789 / L1792
页数：4
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