2005年7月
Annealing effects in pit-processed MgB2/SUS316 (stainless steel) composite wires
MODERN PHYSICS LETTERS B
- ,
- ,
- ,
- 巻
- 19
- 号
- 16
- 開始ページ
- 793
- 終了ページ
- 800
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1142/S0217984905008803
- 出版者・発行元
- WORLD SCIENTIFIC PUBL CO PTE LTD
The MgB2/SUS316 (stainless steel) wires were fabricated by powder-in-tube (PIT) method using commercially available superconducting MgB2 powder at ambient pressure, and the annealing effects on T-c as well as J(c) were investigated. The as-rolled MgB2/SUS316 wire showed a zero-resistance superconducting transition temperature (T-c) at 33.4 K and a critical current density (J(c)(self-field)) of 2.22 kAcm(-2) at 18.4 K. In order to check the annealing effect, the different pieces of the as-rolled wires were annealed at various annealing conditions under Ar atmosphere in vacuum (60 cm Hg) sealed silica-tube. As compared to the MgB2/Fe wires, the annealing temperature and duration were lower and much shorter respectively, for the MgB2/SUS316 (stainless steel) wires. On annealing at 873 K for similar to 1 s, we obtained the best sample with a J(c)(self-field) of 12.1 kAcm(-2) at 16.9 K with a maximum T-c of 36.1 K. Longer annealing time (similar to 10 s) above 873 K reduced the T-c as well as the J(c), indicating a possible chemical reaction between the MgB2 cores and the sheath material.
- リンク情報
- ID情報
-
- DOI : 10.1142/S0217984905008803
- ISSN : 0217-9849
- Web of Science ID : WOS:000232376400005