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Optimizing C incorporation into magnesium diboride.

In this work, either SiC or separate Si and C (Si+C) powders of up to 10 weight percentage were in situ reacted with Mg and B (molar ratio of 1:2) and the superconducting properties compared. The latter shows a smaller a-axis lattice cell parameter as compared to the same level of SiC additions, ind...

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Main Authors: Soo, Kien Chen, Kwee, Y. Tan, Kar, Ban Tan, Shaari, Abdul Halim, Kursumovic, Ahmed, MacManus-Driscoll, Judith L.
Format: Article
Language:English
Published: Institute of Electrical and Electronics Engineers 2011
Online Access:http://psasir.upm.edu.my/id/eprint/24636/
http://www.ieee.org/
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spelling my.upm.eprints.246362013-09-19T03:39:59Z http://psasir.upm.edu.my/id/eprint/24636/ Optimizing C incorporation into magnesium diboride. Soo, Kien Chen Kwee, Y. Tan Kar, Ban Tan Shaari, Abdul Halim Kursumovic, Ahmed MacManus-Driscoll, Judith L. In this work, either SiC or separate Si and C (Si+C) powders of up to 10 weight percentage were in situ reacted with Mg and B (molar ratio of 1:2) and the superconducting properties compared. The latter shows a smaller a-axis lattice cell parameter as compared to the same level of SiC additions, indicating a higher level of C substitution. In those samples, a larger increase in the C-axis is also noticeable and a more severe degradation in the superconducting transition temperature is observed. However, reaction with SiC causes a greater broadening in the transition width. At both 5Kand 20 K, for samples reacted with SiC (up to 5 wt.%) a stronger improvement in the magnitude of critical current density, J c, is obtained. On the other hand, samples reacted with (Si+C) show a weaker dependence on field at 5 K because of higher C substitution. At 20 K, the decreases more rapidly with field for the same level of SiC additions. Hence, for high temperature (20 K) and lowfield (<5 T) applications, reaction with SiC is preferred for obtaining higher J c (H). Institute of Electrical and Electronics Engineers 2011 Article PeerReviewed Soo, Kien Chen and Kwee, Y. Tan and Kar, Ban Tan and Shaari, Abdul Halim and Kursumovic, Ahmed and MacManus-Driscoll, Judith L. (2011) Optimizing C incorporation into magnesium diboride. IEEE Transactions on Applied Superconductivity, 21 (3). pp. 2627-2630. ISSN 1051-8223 http://www.ieee.org/ 10.1109/TASC.2010.2089420 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description In this work, either SiC or separate Si and C (Si+C) powders of up to 10 weight percentage were in situ reacted with Mg and B (molar ratio of 1:2) and the superconducting properties compared. The latter shows a smaller a-axis lattice cell parameter as compared to the same level of SiC additions, indicating a higher level of C substitution. In those samples, a larger increase in the C-axis is also noticeable and a more severe degradation in the superconducting transition temperature is observed. However, reaction with SiC causes a greater broadening in the transition width. At both 5Kand 20 K, for samples reacted with SiC (up to 5 wt.%) a stronger improvement in the magnitude of critical current density, J c, is obtained. On the other hand, samples reacted with (Si+C) show a weaker dependence on field at 5 K because of higher C substitution. At 20 K, the decreases more rapidly with field for the same level of SiC additions. Hence, for high temperature (20 K) and lowfield (<5 T) applications, reaction with SiC is preferred for obtaining higher J c (H).
format Article
author Soo, Kien Chen
Kwee, Y. Tan
Kar, Ban Tan
Shaari, Abdul Halim
Kursumovic, Ahmed
MacManus-Driscoll, Judith L.
spellingShingle Soo, Kien Chen
Kwee, Y. Tan
Kar, Ban Tan
Shaari, Abdul Halim
Kursumovic, Ahmed
MacManus-Driscoll, Judith L.
Optimizing C incorporation into magnesium diboride.
author_facet Soo, Kien Chen
Kwee, Y. Tan
Kar, Ban Tan
Shaari, Abdul Halim
Kursumovic, Ahmed
MacManus-Driscoll, Judith L.
author_sort Soo, Kien Chen
title Optimizing C incorporation into magnesium diboride.
title_short Optimizing C incorporation into magnesium diboride.
title_full Optimizing C incorporation into magnesium diboride.
title_fullStr Optimizing C incorporation into magnesium diboride.
title_full_unstemmed Optimizing C incorporation into magnesium diboride.
title_sort optimizing c incorporation into magnesium diboride.
publisher Institute of Electrical and Electronics Engineers
publishDate 2011
url http://psasir.upm.edu.my/id/eprint/24636/
http://www.ieee.org/
_version_ 1643828420620058624
score 13.211869

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