August 03, 2010

Details on How Superconducting Wire Will Achieve Widescale Commercialization by 2015


A 31 page presentation by Superpower Inc at the Applied Superconductivity Conference, Washington D.C., August 1 - 6, 2010 described the details of their plan to achieve broad commercialization of superconducting wire.

They indicate that they are at $400/kA-meter at 77K, but they are hitting the $100/kA-meter price at the temperature of 30 Kelvin.

The price targets at operating field and temperature are

* < $ 100/kA-m* For commercial market entry (small market)
* < $50/kA-m* For medium commercial market
* < $25/kA-m* For large commercial market


Objectives of UH-SuperPower program focused on meeting wire price-performance metrics
• Higher self-field critical current in 2G wire by increasing film thickness
– HTS is still only 1 to 3% of 2G wire compared with 40% in 1G wire and is the only process that needs to be changed in 2G wire for high Ic.
• Significantly modify in-field critical current performance of 2G wire
– Maximize potential of rare-earth, dopant, nanostructure modifications to tailor in-field critical current in device operating conditions
• Reduce wire cost by high efficiency, simpler processes
– Silver electrodepositioninstead of sputtering
– Substrate planarization instead of electropolishing+ buffer
– Improved MOCVD precursor conversion efficiency (only 15% now)
• Reduce wire cost by increased yield
– Develop new and enhanced on-line QA/QC tools
• Added value to customer with advanced wire architectures
– Multifilamentarywire for low ac loss


• Systematic study of improved pinning by Zraddition in MOCVD films at UH.
• Two-fold improvement in in-field performance achieved !

• Zr-doped production wires with new composition exhibit significantly improved critical current at 4.2 K in high magnetic fields up to 30 Telsa


Goals for wire performance improvements

• Two-fold improvement in in-field performance achieved with Zr-doped wires
• Further improvement in Icat B || c : Now 30% retention of 77 K, zero field value at 77 K, 1 T ; Goal is 50%.
• Improvement in minimum Iccontrolling factor for most coil performance : Now 15 to 20% retention of 77 K, zero field value at 77 K, 1 T ; Goal is first 30% and then 50%
• Together with a zero-field Icof 400 A/4 mm at 77 K, self field 200 A/4 mm at 77 K, 1 T in all field orientations.
• Achieve improved performance levels at lower temperatures too (< 65 K)
• Exploring other pathways to improve in-field performance : alternate dopants
• Exploring new pathways to improve in-field performance : directed assembly
• One approach is to direct the nucleation of self-assembled nanorods from pre-deposited nucleation sites on the LMO buffer surface
• Ag (silver) in 2G wire is a limiting factor in production capacity and wire cost
• Electrodepositionis a lower-cost alternative to vacuum sputtering now used


Another presentation had some more information. (61 pages)

2011 Plans

Manufacturing of long-length, high current wires at high throughput
• Increase self-field performance of production 2G wires by 25%
• Increase in-field performance of Zr-doped AP wires by additional 25%
• Increase production capacity and throughput by 50 - 75%
• Decrease cost by 20 - 30%
– Double volume of 500+ continuous meter wires
• Improved pinning for enhanced high-field performance

If you liked this article, please give it a quick review on Reddit, or StumbleUpon. Thanks

Supporting Advertising

Business Success
   How to Make Money    
Executive Jobs
Paid Surveys


Thank You

Congratulations! Now you can use SolidOpinion commenting system in all its magnificence! Click the link to get your password.

Форма для связи

Name

Email *

Message *