Structure and critical current of Ni-sheathed PIT MgB2 tapes with In metal powder addition

Autor:	Kyoji Tachikawa, Makoto Aodai, Yutaka Yamada, Hiroaki Kumakura, Masakazu Enomoto
Rok vydání:	2003
Předmět:	Materials science Fabrication Annealing (metallurgy) Energy Engineering and Power Technology Metal powder Low melting point Critical current Electrical and Electronic Engineering Composite material Condensed Matter Physics Electronic Optical and Magnetic Materials
Zdroj:	Physica C: Superconductivity. :1030-1034
ISSN:	0921-4534
DOI:	10.1016/s0921-4534(03)01159-6
Popis:	PIT MgB 2 tapes have been prepared through an ex situ process using a Ni sheath. Different kinds of metal powder were added to the MgB 2 core. Soft metals like Ag and Cu show an elongated morphology in the core after the fabrication. Low melting point metal powder like In impregnates into gaps among MgB 2 grains due to the heat generated during the fabrication. The addition of In and Sn produces an appreciable increase in the J c of MgB 2 tapes. The annealing at 200 °C yields further increase in the tape with In and Sn addition. The enhancement of J c by the In addition and the 200 °C annealing reaches a factor of ∼7. The In addition also improves the n value and the strain tolerance of the tape. The improvement in the linkage of MgB 2 grains seems to be the major origin for the enhancement in J c by the In addition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a1e9c3a4e91a5658a12051b102c47009 https://doi.org/10.1016/s0921-4534(03)01159-6 Zobrazit plný text záznamu Full Text from ScienceDirect