摘要
Through magnetization measurement with a SQUID magnetometer the heat treatment optimization of an international thermonuclear experimental reactor (ITER)-type internal-Sn Nb3Sn superconducting wire has been investigated. The irreversibility temperature T*(H), which is mainly dependent on A15 phase composition, was obtained by a warming and cooling cycle at a fixed field. The hysteresis width ΔM(H) which reflects the flux pinning situation of the A15 phase is determined by the sweeping of magnetic field at a constant temperature. The results obtained from differently heat-treated samples show that the combination of T*(H) with ΔM(H) measurement is very effective for optimizing the heat reaction process. The heat treatment condition of the ITER-type wire is optimized at 675°C128 h, which results in a composition closer to stoichiometric Nb 3Sn and a state with best flux pinning.
源语言 | 英语 |
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文章编号 | 048 |
页(从-至) | 1764-1769 |
页数 | 6 |
期刊 | Chinese Physics |
卷 | 16 |
期 | 6 |
DOI | |
出版状态 | 已出版 - 1 6月 2007 |
已对外发布 | 是 |