Excess Mg addition MgB2/Fe wires with enhanced critical current density

Zeng, Rong; Lü, Lin; Li, Wenxian; Wang, Jianli; Shi, Dongqi; Horvat, J.; Dou, Shi Xue; Bhatia, M.; Sumption, M.D.; Collings, E. W.; Yoo, Jaimoo; Tomsic, M.; Rindfleisch, M.

doi:10.1063/1.2909203

Cited by 17 publications

(12 citation statements)

References 16 publications

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“…It is plausible to assume that the 1 wt. % of unreacted Mg of this sample acts as an adhesive between MgB2 individual grains and facilitates aggregation, as already reported in the literature [47,48].…”

Section: Resultssupporting

confidence: 80%

“…However, on a larger scale, the same sample shows the abundant presence of lumpy spherical aggregates approximately 5 μm in diameter (see Figure 3 d). One of these aggregates is highlighted with crossed markers in Figure 3 e. It is plausible to assume that the 1 wt.% of unreacted Mg of this sample acts as an adhesive between MgB 2 individual grains and facilitates aggregation, as already reported in the literature [ 47 , 48 ].…”

Section: Resultssupporting

confidence: 65%

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Antimicrobial Activity of MgB2 Powders Produced via Reactive Liquid Infiltration Method

et al. 2021

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We report for the first time on the antimicrobial activity of MgB2 powders produced via the Reactive Liquid Infiltration (RLI) process. Samples with MgB2 wt.% ranging from 2% to 99% were obtained and characterized, observing different levels of grain aggregation and of impurity phases. Their antimicrobial activity was tested against Staphylococcus aureus ATCC BAA 1026, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Candida albicans ATCC 10231. A general correlation is observed between the antibacterial activity and the MgB2 wt.%, but the sample microstructure also appears to be very important. RLI-MgB2 powders show better performances compared to commercial powders against microbial strains in the planktonic form, and their activity against biofilms is also very similar.

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Section: Resultssupporting

confidence: 80%

Section: Resultssupporting

confidence: 65%

Antimicrobial Activity of MgB2 Powders Produced via Reactive Liquid Infiltration Method

et al. 2021

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“…Chen et al 5 reported the possibility of improved J c in low magnetic fields from a high Mg content in MgB 2 . Zeng et al 6 showed that 10 wt % Mg excess could improve the J c values of MgB 2 wires over the entire range of measurement fields, 0-8.5 T.…”

Section: Introductionmentioning

confidence: 99%

The combined influence of connectivity and disorder on Jc and Tc performances in MgxB2+10wt %SiC

Zeng

Lü

et al. 2009

Journal of Applied Physics

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The influences of connectivity and disorder on the critical current density J c are discussed to clarify the different mechanisms of J c ͑H͒ enhancement in different magnetic field ranges. Excess Mg in Mg x B 2 +10 wt % SiC composites effectively improves the connectivity, as evidenced by both the resistivity properties and the Raman scattering. The promising J c ͑H͒ of Mg 1.15 B 2 +10 wt % SiC is attributed to both the high connectivity and the improved irreversibility field, H irr , which is in agreement with the Raman fitting analysis. Raman scattering measurements suggest a strengthened electron-E 2g coupling and weakened disorder with Mg addition.

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“…17 Currently, in situ MgB 2 wires are fabricated by two methods: with barriers 16,18,19 and without barriers. [20][21][22] Metal barriers are made with Nb, Ta, and Ti. 16,18,19 In situ MgB 2 wires with barriers have high J c , B irr , and B c2 .…”

Section: Introductionmentioning

confidence: 99%

The critical parameters in in-situ MgB2 wires and tapes with ex-situ MgB2 barrier after hot isostatic pressure, cold drawing, cold rolling and doping

Gajda¹,

Morawski

Zaleski

et al. 2015

Journal of Applied Physics

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MgB 2 precursor wires were prepared using powder in tube technique by Institute of High Pressure PAS in Warsaw. All samples were annealed under isostatic pressure generated by liquid Argon in the range from 0.3 GPa to 1 GPa. In this paper, we show the effects of different processing routes, namely, cold drawing (CD), cold rolling (CR), hot isostatic pressure (HIP) and doping on critical current density (J c), pinning force (F p), irreversible magnetic-field (B irr), critical temperature (T c), n value, and dominant pinning mechanism in MgB 2 /Fe wires with ex situ MgB 2 barrier. The results show that medium pressures ($0.35 GPa) lead to high J c in low and medium magnetic fields (0 T-9 T). On the other hand, higher pressures ($1 GPa) lead to enhanced J c in high magnetic fields (above 9 T). Transport measurements show that CD, CR, and HIP have small effects on B irr and T c , but CD, CR, HIP, and doping enhance J c and F p in in situ MgB 2 wires with ex situ MgB 2 barrier. Transport measurements on in situ undoped MgB 2 wire with ex situ MgB 2 barrier yield a J c of about 100 A/mm 2 at 4.

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Excess Mg addition MgB2/Fe wires with enhanced critical current density

Cited by 17 publications

References 16 publications

Antimicrobial Activity of MgB2 Powders Produced via Reactive Liquid Infiltration Method

Antimicrobial Activity of MgB2 Powders Produced via Reactive Liquid Infiltration Method

The combined influence of connectivity and disorder on Jc and Tc performances in MgxB2+10wt %SiC

The critical parameters in in-situ MgB2 wires and tapes with ex-situ MgB2 barrier after hot isostatic pressure, cold drawing, cold rolling and doping

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