Effect of Various C Sources Co-Doping on Transport Critical Current Density and Grains-Connectivity of MgB2/Fe Tapes

Xi Feng Pan; Guo Yan; Xiang Hong Liu; Yong Feng; Ping Xiang Zhang; Yong Zhao; Akiyoshi Mastumoto; Hiroshi Kumakura

doi:10.4028/www.scientific.net/MSF.745-746.214

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746Effect of Various C Sources Co-Doping on Transport...

Effect of Various C Sources Co-Doping on Transport Critical Current Density and Grains-Connectivity of MgB₂/Fe Tapes

Abstract:

In this paper, we have prepared a series of Fe sheathed MgB₂ tapes with SiC, Malic acid and C₉H₁₁NO mono-and co-doping by in-situ powder-in-tube (PIT) method, and studied the effects of various C sources co-doping on transport critical current density and flux pinning of MgB₂/Fe tapes. The results suggest by various C sources co-doping, the amount of C substitution for boron largely increase, comparing to SiC, Malic acid or C₉H₁₁NO mono-doped sample. For MgB₂/Fe tapes with 5 mol% SiC+10 wt% Malic acid and 4 wt% C₉H₁₁NO+10 wt% Malic acid co-doping, the transport J_c at 4.2 K and 10 T are 14.8 and 13.5 kA/cm², respectively, which are clearly higher than the J_c of these dopants mono-doped samples. Furthermore, it is found that at the 4 wt.% C₉H₁₁NO doped MgB₂, the poor in-field J_c should be attributing to the cracks at grains boundary, which results in the bad grains-connectivity.

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Periodical:

Materials Science Forum (Volumes 745-746)

Pages:

214-218

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.214

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Online since:

February 2013

Authors:

Xi Feng Pan, Guo Yan, Xiang Hong Liu, Yong Feng, Ping Xiang Zhang, Yong Zhao, Akiyoshi Mastumoto, Hiroshi Kumakura

Keywords:

Co-Doping, Critical Current Density, Flux Pinning, Grains-Connectivity, MgB₂

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