Influence of preparation process on microstructure, critical current density and Tc of MgB2/Fe/Cu wires

Y. F. Wu; G. Yan; J. S. Li; Y. Feng; S. K. Chen; H. P. Tang; H. L. Xu; C. S. Li; P. X. Zhang; Y. F. Lu

doi:10.4028/0-87849-432-4.2031

Influence of preparation process on microstructure, critical current density and T_c of MgB₂/Fe/Cu wires

Y. F. Wu, G. Yan, J. S. Li, Y. Feng, S. K. Chen, H. P. Tang, H. L. Xu, C. S. Li, P. X. Zhang, Y. F. Lu

School of Materials Sience and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The powder-in-tube MgB₂ wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB₂ grains in wires were very small (20-100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower T_c of about 35K, the transport current density reached to 3×10⁴A/cm² at 15K and 3.5T for wires sintered at 700°C.

Original language	English
Title of host publication	Progress in Light Metals, Aerospace Materials and Superconductors
Publisher	Trans Tech Publications Ltd
Pages	2031-2034
Number of pages	4
Edition	PART 4
ISBN (Print)	0878494324, 9780878494323
DOIs	https://doi.org/10.4028/0-87849-432-4.2031
State	Published - 2007
Event	2006 Beijing International Materials Week, 2006 BIMW - International Conference on Superconducting Materials, ICSM 2006 - Beijing, China Duration: 25 Jun 2006 → 30 Jun 2006

Publication series

Name	Materials Science Forum
Number	PART 4
Volume	546-549
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Conference

Conference	2006 Beijing International Materials Week, 2006 BIMW - International Conference on Superconducting Materials, ICSM 2006
Country/Territory	China
City	Beijing
Period	25/06/06 → 30/06/06

Keywords

Critical current density
High energy milling
MgB wires

Access to Document

10.4028/0-87849-432-4.2031

Cite this

Wu, Y. F., Yan, G., Li, J. S., Feng, Y., Chen, S. K., Tang, H. P., Xu, H. L., Li, C. S., Zhang, P. X., & Lu, Y. F. (2007). Influence of preparation process on microstructure, critical current density and T_c of MgB₂/Fe/Cu wires. In Progress in Light Metals, Aerospace Materials and Superconductors (PART 4 ed., pp. 2031-2034). (Materials Science Forum; Vol. 546-549, No. PART 4). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-432-4.2031

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title = "Influence of preparation process on microstructure, critical current density and Tc of MgB2/Fe/Cu wires",

abstract = "The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains in wires were very small (20-100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower Tc of about 35K, the transport current density reached to 3×104A/cm2 at 15K and 3.5T for wires sintered at 700°C.",

keywords = "Critical current density, High energy milling, MgB wires",

author = "Wu, {Y. F.} and G. Yan and Li, {J. S.} and Y. Feng and Chen, {S. K.} and Tang, {H. P.} and Xu, {H. L.} and Li, {C. S.} and Zhang, {P. X.} and Lu, {Y. F.}",

year = "2007",

doi = "10.4028/0-87849-432-4.2031",

language = "英语",

isbn = "0878494324",

series = "Materials Science Forum",

publisher = "Trans Tech Publications Ltd",

number = "PART 4",

pages = "2031--2034",

booktitle = "Progress in Light Metals, Aerospace Materials and Superconductors",

edition = "PART 4",

note = "2006 Beijing International Materials Week, 2006 BIMW - International Conference on Superconducting Materials, ICSM 2006 ; Conference date: 25-06-2006 Through 30-06-2006",

}

Wu, YF, Yan, G, Li, JS, Feng, Y, Chen, SK, Tang, HP, Xu, HL, Li, CS, Zhang, PX & Lu, YF 2007, Influence of preparation process on microstructure, critical current density and T_c of MgB₂/Fe/Cu wires. in Progress in Light Metals, Aerospace Materials and Superconductors. PART 4 edn, Materials Science Forum, no. PART 4, vol. 546-549, Trans Tech Publications Ltd, pp. 2031-2034, 2006 Beijing International Materials Week, 2006 BIMW - International Conference on Superconducting Materials, ICSM 2006, Beijing, China, 25/06/06. https://doi.org/10.4028/0-87849-432-4.2031

Influence of preparation process on microstructure, critical current density and T_c of MgB₂/Fe/Cu wires. / Wu, Y. F.; Yan, G.; Li, J. S. et al.
Progress in Light Metals, Aerospace Materials and Superconductors. PART 4. ed. Trans Tech Publications Ltd, 2007. p. 2031-2034 (Materials Science Forum; Vol. 546-549, No. PART 4).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Influence of preparation process on microstructure, critical current density and Tc of MgB2/Fe/Cu wires

AU - Wu, Y. F.

AU - Yan, G.

AU - Li, J. S.

AU - Feng, Y.

AU - Chen, S. K.

AU - Tang, H. P.

AU - Xu, H. L.

AU - Li, C. S.

AU - Zhang, P. X.

AU - Lu, Y. F.

PY - 2007

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N2 - The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains in wires were very small (20-100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower Tc of about 35K, the transport current density reached to 3×104A/cm2 at 15K and 3.5T for wires sintered at 700°C.

AB - The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains in wires were very small (20-100nm) and resemble the dimple after post-heat treatment. The clear evidence for transcrystlline fracture was observed. It indicated that the grain connection was greatly improved and the fluxing pinning was significantly enhanced. Another point to view was no intermediate annealing during the whole rolling process. The influence of the post-heat treatment on the transport current density was studied. Despite the lower Tc of about 35K, the transport current density reached to 3×104A/cm2 at 15K and 3.5T for wires sintered at 700°C.

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KW - High energy milling

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BT - Progress in Light Metals, Aerospace Materials and Superconductors

PB - Trans Tech Publications Ltd

T2 - 2006 Beijing International Materials Week, 2006 BIMW - International Conference on Superconducting Materials, ICSM 2006

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