Heat Treatment Optimization Studies on PIT Nb3Sn Strand for the NED Project

被引：27

作者：

Boutboul, Thierry ^{[1
]}

Oberli, Luc ^{[1
]}

den Ouden, Andries ^{[2
]}

Pedrini, Danilo ^{[3
]}

Seeber, Bernd ^{[4
]}

Volpini, Giovanni ^{[3
]}

机构：

[1] CERN, AT Dept, CH-1211 Geneva 23, Switzerland

[2] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[3] INFN Milan LASA, I-20090 Milan, Italy

[4] Univ Geneva, CH-1211 Geneva, Switzerland

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2009年 / 19卷 / 03期

关键词：

Low-temperature superconductors; niobium compounds; superconducting materials measurements; superconducting wires;

D O I：

10.1109/TASC.2009.2019017

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

For the Next European Dipole (NED) program, a Powder-In-Tube (PIT) strand was successfully developed by SMI. This high-performance Nb3Sn strand presents a non-copper critical current density of similar to 2500 A/mm(2) at 12 T applied field and 4.2 K and a filament diameter around 50 mu m. Extensive heat treatment optimization studies were performed in order to maximize both critical current and RRR, with a plateau temperature down to 625 degrees C and duration up to 400 hours. It appears that a critical current enhancement of similar to 10% can be achieved for a reaction schedule of 320 hours at 625 degrees C with non-copper critical current density respectively exceeding 2700 and 1500 A/mm(2) at 12 and 15 T (4.2 K). Thanks to this modified heat treatment, this strand completely fulfills the NED stringent specification.

引用

页码：2564 / 2567

页数：4

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