- Tytuł:
- Superconducting and Microstructural Properties of (Mg+2B)+MgB$\text{}_{2}$/Cu Wires Obtained by High Gas Pressure Technology
- Autorzy:
-
Kario, A.
Morawski, A.
Głowacki, B. A.
Łada, T.
Smaga, M.
Diduszko, R.
Kolesnikov, D.
Zaleski, A. J.
Kondrat, A.
Gajda, D. - Powiązania:
- https://bibliotekanauki.pl/articles/2047331.pdf
- Data publikacji:
- 2007-05
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 84.71.Mn
- Opis:
- In order to improve the overall critical current characteristics of Cu sheathed in situ MgB$\text{}_{2}$ wires a special architecture of the wire, and processing parameters were used. The study presents the influence of the ex situ MgB$\text{}_{2}$ chemical barrier between ex situ core and Cu, suppressing the reaction of Cu with Mg. Wires, doped with 10 at.% SiC of 18 nm average grain size, were fabricated from MgH$\text{}_{2}$ and B or from Mg and B powders, using the powder-in-tube method. The methods of rotary swaging or drawing were used as the alternating wire-forming processes. The samples were annealed under high Ar gas pressure (hot isostatic pressing) at 750ºC and 1.0 GPa for 15 and 30 min. A significant difference in Cu distribution across the wires for a long and short time of sintering was observed. The formation of microstructure in the powder-in-tube process and the relationship between the microstructure and critical current density J$\text{}_{c}$ values, are discussed in this paper.
- Źródło:
-
Acta Physica Polonica A; 2007, 111, 5; 693-703
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł