A TEM STUDY OF GRAIN-BOUNDARIES IN ZONE-MELTED YBA2CU3OX

被引：7
作者：
CHEN, JG
SHI, DL
WAYMAN, CM
MCGINN, PJ
CHEN, WH
ZHU, N
机构：
[1] UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801
[2] UNIV NOTRE DAME,DEPT ELECT ENGN,NOTRE DAME,IN 46556
来源：
MATERIALS LETTERS | 1992年 / 14卷 / 2-3期
关键词：
D O I：
10.1016/0167-577X(92)90199-T
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Grain boundaries in zone-melted YBa2Cu3Ox have been studied in detail by means of transmission electron microscopy. Tilt and twist types of low-angle grain boundaries have been observed, which are composed of both edge and screw dislocations. These boundaries possess high crystal coherence and intimate contact. The low-angle boundaries are also found to be free of second phases. Direct dc transport critical current density, J(c), at 77 K shows great improvement in the zone-melted sample compared with that of a conventionally sintered sample. The relationship between the enhanced J(c) and the low-angle grain boundaries is discussed.
引用
收藏
页码：177 / 181
页数：5
相关论文
共 19 条
[1]   WEAK-LINK-FREE BEHAVIOR OF HIGH-ANGLE YBA2CU3O7-DELTA GRAIN-BOUNDARIES IN HIGH MAGNETIC-FIELDS [J].
BABCOCK, SE ;
CAI, XY ;
KAISER, DL ;
LARBALESTIER, DC .
NATURE, 1990, 347 (6289) :167-169
[2]  
CHAN SW, 1989, AIP C P, V200, P172
[3]   SUPERCONDUCTING TRANSPORT-PROPERTIES OF GRAIN-BOUNDARIES IN YBA2CU3O7 BICRYSTALS [J].
DIMOS, D ;
CHAUDHARI, P ;
MANNHART, J .
PHYSICAL REVIEW B, 1990, 41 (07) :4038-4049
[4]   ORIENTATION DEPENDENCE OF GRAIN-BOUNDARY CRITICAL CURRENTS IN YBA2CU3O7-DELTA BICRYSTALS [J].
DIMOS, D ;
CHAUDHARI, P ;
MANNHART, J ;
LEGOUES, FK .
PHYSICAL REVIEW LETTERS, 1988, 61 (02) :219-222
[5]  
EKIN JW, 1987, ADV CERAM MATER, V2, P586
[6]   DOUBLE-STEP BEHAVIOR OF CRITICAL CURRENT VS-BASED MAGNETIC-FIELD IN Y-BASED, BI-BASED AND T1-BASED BULK HIGH-TC SUPERCONDUCTORS [J].
EKIN, JW ;
LARSON, TM ;
HERMANN, AM ;
SHENG, ZZ ;
TOGANO, K ;
KUMAKURA, H .
PHYSICA C, 1989, 160 (5-6) :489-496
[7]   MICROSTRUCTURE AND DEFECTS IN ALPHA-AXIS ORIENTED YBA2CU3O7-X THIN-FILMS [J].
GAO, Y ;
BAI, G ;
LAM, DJ ;
MERKLE, KL .
PHYSICA C, 1991, 173 (5-6) :487-500
[8]   IMPROVED CRITICAL CURRENT CHARACTERISTICS IN 1-2-3 OXIDE SUPERCONDUCTORS - WEAK FLUX PINNING AND PERCOLATIVE ASPECTS [J].
HAMPSHIRE, DP ;
CAI, X ;
SEUNTJENS, J ;
LARBALESTIER, DC .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1988, 1 (01) :12-19
[9]   HIGH CRITICAL CURRENTS IN Y-BA-CU-O SUPERCONDUCTORS [J].
JIN, S ;
TIEFEL, TH ;
SHERWOOD, RC ;
DAVIS, ME ;
VANDOVER, RB ;
KAMMLOTT, GW ;
FASTNACHT, RA ;
KEITH, HD .
APPLIED PHYSICS LETTERS, 1988, 52 (24) :2074-2076
[10]   TEXTURE PROCESSING OF YBA2CU3O7-X BY JOULE HEAT ZONE-MELTING [J].
MCGINN, PJ ;
BLACK, MA ;
VALENZUELA, A .
PHYSICA C, 1988, 156 (01) :57-61
12