Microstructures and superconducting properties of MgB2 bulk samples processed by ultra-high pressure-assisted sintering
Microstructures and superconducting properties of MgB2 bulk samples processed by ultra-high pressure-assisted sintering
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超高压辅助烧结MgB2块体样品的微观结构和超导性能
DOI:
10.1016/j.jeurceramsoc.2022.09.008
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发表时间:
2022
影响因子:
5.7
通讯作者:
Gao Z
中科院分区:
文献类型:
--
作者:
Gao Z
Nanocrystalline MgB2bulk superconductors have been fabricated by ultra-high pressure-assisted sintering (∼ 5 GPa) over a range of temperatures (700 °C-1100 °C). Phase evolution and morphology, grain size and lattice defects were systematically investigated. The superconducting performance was measured using magnetization methods and linked to the corresponding microstructural features. A sample processed at 900 °C and 5 GPa achieved a Jcvalue of 4.5 × 107A/m2at 4.2 K, 6 T, 30 times and more than 100 times higher than those prepared at 800 and 1100 °C respectively, under similar pressures. Its superior superconducting properties arise from the combination of limited grain growth, retained crystal defects and complete densification achieved in a rapid process by the application of ultra-high pressure. This study reveals the importance of microstructure in controlling the superconducting behavior in sintered MgB2, especially the sample homogeneity that can affect the length scales over which the supercurrents flow.
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影响因子:
3.6
作者:
Shoichi Sugino;A. Yamamoto;J. Shimoyama;K. Kishio
通讯作者:
Shoichi Sugino;A. Yamamoto;J. Shimoyama;K. Kishio
影响因子:
3.6
作者:
T. Prikhna;W. Gawalek;Y. Savchuk;T. Habisreuther;M. Wendt;N. Sergienko;V. Moshchil;P. Nagorny;C. Schmidt;J. Dellith;U. Dittrich;D. Litzkendorf;V. Melnikov;V. Sverdun
通讯作者:
V. Sverdun
影响因子:
3.6
作者:
S. Mizutani;A. Yamamoto;J. Shimoyama;H. Ogino;K. Kishio
通讯作者:
S. Mizutani;A. Yamamoto;J. Shimoyama;H. Ogino;K. Kishio
DOI:
10.1016/j.physc.2012.01.023
发表时间:
2012-07-01
影响因子:
1.7
作者:
Aldica, G.;Batalu, D.;Badica, P.
通讯作者:
Badica, P.
影响因子:
4
作者:
Brutti, S;Ciccioli, A;Palenzona, A
通讯作者:
Palenzona, A