Grain size dependence of the critical current density in YBa2Cu3Oxsuperconductors

1989 ◽  
Vol 55 (26) ◽  
pp. 2781-2783 ◽  
Author(s):  
M. Kuwabara ◽  
H. Shimooka
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Size Dependence

Study on the High Speed Jet-Electrode Position Ni-P Alloy

2013 ◽  
Vol 567 ◽  
pp. 39-44
Author(s):  
Ying Wang ◽  
Min Kang ◽  
Yong Yang ◽  
Xiu Qing Fu
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
High Speed ◽  
Electrode Position ◽  
Stirring Intensity

The high speed jet-electrodepositing equipment was used to prepare Ni-P alloy in substrate of 45 steel. The influences of current density on depositing rate, hardness of deposit and microstructure of Ni-P alloy were studied, and the comparation with that of conventional electroplating were studied. The results show that with the increase of stirring intensity of the electrolyte, the thickness of diffused layer decreases, the critical current density increases, and then the depositing rates increase to 69.82/min. A linear increasing of the depositing rate with the increase of current density is observed, and it refines grain size obviously. Deposit hardness up to 679HV.

Defect size dependence of critical current density enhancement for irradiated YBa2Cu3O7−δ

1992 ◽  
Vol 191 (1-2) ◽  
pp. 199-204 ◽  
Author(s):  
J. Bechtold ◽  
Y.Y. Xue ◽  
Z.J. Huang ◽  
E.V. Hungerford ◽  
P.H. Hor ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Size Dependence ◽  
Defect Size ◽  
Density Enhancement

scholarly journals Effect of grain size and doping level of sic on the superconductivity and critical current density in MgB/sub 2/ superconductor

2003 ◽  
Vol 13 (2) ◽  
pp. 3273-3276 ◽  
Author(s):  
S. Soltanian ◽  
Xiaolin Wang ◽  
J. Horvat ◽  
Mengjun Qin ◽  
Huakun Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Doping Level

scholarly journals Sample-size dependence of the magnetic critical current density inMgB2superconductors

2004 ◽  
Vol 69 (1) ◽  
Author(s):  
M. J. Qin ◽  
S. Keshavarzi ◽  
S. Soltanian ◽  
X. L. Wang ◽  
H. K. Liu ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Sample Size ◽  
Critical Current ◽  
Current Density ◽  
Size Dependence

Crystallization of A15 Nb3Ge from the amorphous state

1990 ◽  
Vol 5 (3) ◽  
pp. 478-483
Author(s):  
Marcin Wardak ◽  
Mireille Treuil Clapp
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Critical Current ◽  
Grain Growth ◽  
Current Density ◽  
Amorphous Material ◽  
Amorphous State ◽  
Average Grain Size ◽  
Melt Spun ◽  
Melt Spun Ribbons

The critical current density Jc of superconductors is strongly dependent on microstructure. The microstructure and crystallization of amorphous Nb75Ge24.5B0.5 melt spun ribbons were studied as a function of 24-h anneals between 680 and 860 °C. Metastable A15 was formed with a composition close to that of the starting amorphous material. As the temperature increased from 680 to 720°C, crystallization remained nonuniform and the average grain size decreased from 130 nm to 60 nm. Between 740 and 800°C crystallization was uniform and the average grain size was constant at 30 nm. Above 820°C grain growth occurred. In order to have high Jc's a uniformly crystallized small-grained material is desirable.

Sign in / Sign up

Export Citation Format

Share Document