NDLI: High Performance 2G Wires: From R&D to Pilot-Scale Manufacturing

Content Provider	IEEE Xplore Digital Library
Author	Selvamanickam, V. Yimin Chen Xuming Xiong Xie, Y.Y. Martchevski, M. Rar, A. Yunfei Qiao Schmidt, R.M. Knoll, A. Lenseth, K.P. Weber, C.S.
Copyright Year	2002
Abstract	Tremendous progress has been accomplished in 2008 in key metrics of YBa₂Cu₃O_x (YBCO) second-generation (2G) HTS wires at SuperPower. Using improved precursor chemistry in our metal organic chemical vapor deposition (MOCVD) process, critical currents (I_c) as high as 813 A/cm were reached over meter-long lengths, representing the highest reported I_c in meter long 2G HTS. By use of Zr doping of (Gd,Y)Ba₂Cu₃O_x, strong enhancements were achieved in in-field performance over a wide angular range. A I_c of 229 A/cm was achieved at 77 K and 1 T perpendicular to the wire which is about a factor of 2.5 times better than that of standard MOCVD-derived films. At 65 K and 3 T, a I_c of 340 A/cm was demonstrated perpendicular to the wire. Kilometer lengths of 2G HTS have been demonstrated for the first time. Over 35 tapes 1,000 to 1,500 m in length with a complete 5-layer buffer stack have been routinely produced in our pilot-scale manufacturing facilities. An excellent in-plane texture of 6 to 7 degrees with a uniformity of about 2% was reproducibly achieved in the kilometer-long fully-buffered tapes. Using these high-quality buffers, the longest 2G wire length to date of 1,311 m was produced with a minimum Ic of 153 A/cm corresponding to a I_c times length value of 200,580 m. Also, an 1,030 m long complete 2G HTS wire has been demonstrated with a minimum Ic of 227 A/cm corresponding to a record I_c times length value of 233,810 A-m. Further, a 630 m long segment of the wire sustained a minimum I_c of 302 A/cm, the longest 2G wire reported to date with a I_c over 300 A/cm. Also, a I_c of 337 A/cm was achieved over a 540 m long segment. All these values represent a 2 to 3 fold improvement in length and I_c of 2G wires compared to our achievements in 2007. In 2008, a 30 m long 2G cable made with nearly 10,000 m of 2G wire previously delivered by SuperPower was successfully installed and energized in the grid of National Grid in downtown Albany, marking the world's first of 2G HTS device in the power grid.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3225
Ending Page	3230
Page Count	6
File Size	1621873
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Manufacturing High temperature superconductors Yttrium barium copper oxide Chemistry Organic chemicals Chemical vapor deposition MOCVD Critical current Zirconium Zr BZO cable critical current IBAD long length second-generation HTS
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Recent Progress in Second-Generation HTS Conductor Scale-Up at SuperPower

Effect of Mn Addition on In-Field Behavior of IBAD/MOCVD Gd-YBCO Second Generation HTS Tapes

Progress in Performance Improvement and New Research Areas for Cost Reduction of 2G HTS Wires

Fabrication of YBCO superconducting tape by metal organic chemical vapor deposition method

Stress–Strain Relationship, Critical Strain (Stress) and Irreversible Strain (Stress) of IBAD-MOCVD-Based 2G HTS Wires Under Uniaxial Tension

Second generation HTS wire based on RABiTS substrates and MOD YBCO

MOD Buffer/YBCO Approach to Fabricate Low-Cost Second Generation HTS Wires

The Development of Second Generation HTS Wire at American Superconductor

Composition Effects on the Critical Current of MOCVD-Processed Zr:GdYBCO Coated Conductors in an Applied Magnetic Field

High Performance 2G Wires: From R&D to Pilot-Scale Manufacturing

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Recent Progress in Second-Generation HTS Conductor Scale-Up at SuperPower

Effect of Mn Addition on In-Field Behavior of IBAD/MOCVD Gd-YBCO Second Generation HTS Tapes

Progress in Performance Improvement and New Research Areas for Cost Reduction of 2G HTS Wires

Fabrication of YBCO superconducting tape by metal organic chemical vapor deposition method

Stress–Strain Relationship, Critical Strain (Stress) and Irreversible Strain (Stress) of IBAD-MOCVD-Based 2G HTS Wires Under Uniaxial Tension

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High Performance 2G Wires: From R&D to Pilot-Scale Manufacturing