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Enhancement of J cB properties for binary and carbon-doped MgB2 tapes by hot pressing

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Abstract:

The effect of the hot pressing method on in situ powder-in-tube-processed MgB2/Fe tapes was studied. The tapes doped with and without nanosized C are hot-pressed at 100 MPa and 650–800 °C for 1–5 h in a flowing Ar gas atmosphere. Compared to the non-hot-pressed tapes, the J cB property (at 4.2 K and 10 T) of pure and C-doped samples hot-pressed at 650 °C for 5 h was enhanced by a factor of 2.5 and 1.4, respectively. For hot-pressed tapes, the optimized sintering temperature is below 700 °C at 100 MPa. The enhancement of J c performance for hot-pressed MgB2 samples is mainly attributed to the improved grain connectivity.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/25/6/065013

Publication date: June 1, 2012

iop/sust/2012/00000025/00000006/art065013
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