本文主要研究了Y211相粒子在顶部籽晶熔融织构YBCO块材中的分布及其对材料超导特性的影响.研究发现,在籽晶正下方,YBCO超导块材中的Y211粒子分布呈不均匀性.样品在近籽晶处Y211粒子非常少,从样品顶部到样品底部Y211相粒子的容积率呈增大趋势.由于Y123粒子和Y211粒子热膨胀系数存在差异,这种不均匀性导致了块材内部产生微裂纹,从而降低了磁悬浮力.
参考文献
| [1] | R L Meng;L Gao;P Gautier-Picard;D.Ramirez, Y.YSun C.W.Chu .[J].Physica C,1994,232:337. |
| [2] | R Dechu;P N Peters;R C Sisk;E.W.Urban, M.Vlasse D.K.Rao .[J].Applied Superconductivity,1993,1:1265. |
| [3] | F C Moon;P z Chang .[J].Applied Physics Letters,1990,56:22. |
| [4] | R Weinstein;I G Chen;J Liu;D.Parks .[J].Applied Physics Letters,1990,56:1475. |
| [5] | A M Campbell;D A Cardwell .[J].CRYOGENICS,1997,37:567. |
| [6] | G Fuchs;G Krabbes;P Schatzle;P.Stoye, T.Staiger K.H,Muller .[J].Physica C,1996,268:115. |
| [7] | R L Meng;C Kinalidis;Y Y Sun;Y.K.Tao, P.H.Horand C.W.Chu .[J].Nature,1990,345:326. |
| [8] | M Murakami .[J].Superconductor Science and Technology,1992,5:185. |
| [9] | P J Smith;D A Cardwell;N H Babu;W.W.Zhou Y.H.Shi .[J].Superconductor Science and Technology,2000,13:1526. |
| [10] | E. S. Reddy;T. Rajasekharan .Melt processign and microstructural analysis of GdBa2Cu3Oy with varying amounts of Gd2BaCuO5 phase[J].Journal of Materials Science,1999(15):3755-3767. |
| [11] | S. Nariki;S. J. Seo .Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba- Cu-O bulk superconductor[J].Superconductor Science & Technology,2000(6):778-784. |
| [12] | N H Babu;T Rajasekharan .[J].Physica C,1998,306:82. |
| [13] | S Yeung;A Banerjee;J Fultz;P.J.McGinn .[J].Materials Science and Engineering,1998,B53:91. |
| [14] | C Varanasi;M A Black;P J McGinn .[J].Superconductor Science and Technology,1994,7:10. |
| [15] | R Cloots;B Robertz;F Auguste;A.Rulmont, H.Bougrine, N.Vandewalle M.Ausloos .[J].Materials Science and Engineering,1998,B53:154. |
| [16] | N H Babu;M Kambara;Y H Shi;D.A.Cardwell, C.D.Tarrant K.R.Schneider .[J].Superconductor Science and Technology,2002,15:104. |
| [17] | C Varanasi;P J McGinn;S Sengupta .[J].Journal of Electronic Materials,1994,11:1143. |
| [18] | G Krabbes;P Schatzle;W Bieger;G.G.Fuch .[J].Applied Superconductivity,1998,6:61. |
| [19] | I Monot;J Wang;M P Delamare;J.Provost G.Desgardin .[J].Physica C,1996,267:173. |
| [20] | H Fujimoto;M Murakami;N Nakamura;S.Gotoh, A.Kondoh, N.Koshizuka S.Tanaka.[A].Berlin:Springer-Verlag,1991:339. |
| [21] | C Kim;H G Lee;K B Kim;G.W.Hong .[J].Journal of Materials Research,1995,10:1605. |
| [22] | M J Cima;M C Flemings;A M Figueredo;M.Nakade, H.Ishii, H.D.Brody, J.S.Haggerty .[J].Journal of Applied Physics,1992,71:1868. |
| [23] | S P Athur;V Selvamanickam;U Balachandran;K.Salama .[J].Journal of Materials Research,1996,11:2976. |
| [24] | H Ledbetter;M Lei;A Hemann;Z.Sheng .[J].Physica C,1994,255:397. |
| [25] | S Nakahara;G J Fisanick;M F Yan;R.B.Van Dover T.J.Boone .[J].Journal of Crystal Growth,1987,85:639. |
| [26] | C J Kim;Y A Jee;G W Hong;T.H.Sung, Y.H.Han, S.C.Han, S.J.Kim, W.Bieger and G .[J].Fuchs Physica C,2000,331:274. |
| [27] | N Sakai;S J Seo;K Inoue;T.Miyamoto M.A.Murakami.Advances in Superconductivity XI,Proc.Int.Symp.on Superconductivity[C].Tokyo:Springer,1998:685. |
| [28] | 刘石香,付华明,徐克西.纳米ZrO2掺杂对烧结DyBaCuO块材微观结构及其超导电性的影响[J].低温物理学报,2004(04):273-279. |
| [29] | 冯喆韵,汪海英,黄参,潘庆谊,施利毅,徐克西.高温超导体Y1-xCaxBa2Cu3O7-δ和Y-123/Cax体系的超导输运特性研究[J].低温物理学报,2005(01):1-7. |
| [30] | 石庆平,冯喆韵,汪海英,黄参,徐克西.Y1-xCaxBa2Cu3O7-δ烧结样品的直流输运特性[J].低温物理学报,2005(01):18-24. |
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