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DC Field | Value | Language |
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dc.contributor.author | Bhagurkar, AG | - |
dc.contributor.author | Yamamoto, A | - |
dc.contributor.author | Anguilano, L | - |
dc.contributor.author | Dennis, AR | - |
dc.contributor.author | Durrell, JH | - |
dc.contributor.author | Babu, NH | - |
dc.contributor.author | Cardwell, DA | - |
dc.date.accessioned | 2016-01-27T11:26:09Z | - |
dc.date.available | 2016-01-25 | - |
dc.date.available | 2016-01-27T11:26:09Z | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Superconductor Science and Technology, 29(3): pp. 1-9, (2016) | en_US |
dc.identifier.issn | 035008 | - |
dc.identifier.issn | 035008 | - |
dc.identifier.issn | 1361-6668 | - |
dc.identifier.uri | http://iopscience.iop.org/article/10.1088/0953-2048/29/3/035008/meta;jsessionid=945BFB96F09B64D196B677805067F768.c3.iopscience.cld.iop.org | - |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/11922 | - |
dc.description.abstract | The wetting of boron with liquid magnesium is a critical factor in the synthesis of MgB2 bulk superconductors by the infiltration and growth (IG) process. Poor wetting characteristics can therefore result potentially in non-uniform infiltration, formation of defects in the final sample structure and poor structural homogeneity throughout the bulk material. Here we report the fabrication of near-net-shaped MgB2 bulk superconductors by a modified precursor infiltration and growth (MPIG) technique. A homogeneous bulk microstructure has subsequently been achieved via the uniform infiltration of Mg liquid by enriching pre-reacted MgB2 powder within the green precursor pellet as a wetting enhancer, leading to relatively little variation in superconducting properties across the entire bulk sample. Almost identical values of trapped magnetic field of 2.12 T have been measured at 5 K at both the top and bottom surfaces of a sample fabricated by the MPIG process, confirming the uniformity of the bulk microstructure. A maximum trapped field of 3 T has been measured at 5 K at the centre of a stack of two bulk MgB2 samples fabricated using this technique. A steady rise in trapped field was observed for this material with decreasing temperature down to 5 K without the occurrence of flux avalanches and with a relatively low field decay rate (1.5%/d). These properties are attributed to the presence of a fine distribution of residual Mg within the bulk microstructure generated by the MPIG processing technique. | en_US |
dc.description.sponsorship | KACSTCambridge Research Centre, Cambridge, UK and Engineering and Physical Science Research Council, UK. JST-PRESTO and JSPS. | en_US |
dc.format.extent | ? - ? (8) | - |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.subject | MgB2 | en_US |
dc.subject | Infiltration and growth | en_US |
dc.subject | Trapped field | en_US |
dc.title | A trapped magnetic field of 3T in homogeneous, bulk MgB2 superconductors fabricated by a Modified Precursor Infiltration and Growth (MPIG) process | en_US |
dc.type | Article | en_US |
dc.identifier.doi | http://dx.doi.org/10.1088/0953-2048/29/3/035008 | - |
dc.relation.isPartOf | Superconductor Science and Technology | - |
pubs.publication-status | Published | - |
pubs.publication-status | Published | - |
pubs.volume | 29 | - |
Appears in Collections: | The Experimental Techniques Centre |
Files in This Item:
File | Description | Size | Format | |
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Fulltext.pdf | 1.64 MB | Adobe PDF | View/Open |
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