Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > ORNL superconducting wire yields unprecedented performance

This figure shows the critical current, Ic, and engineering critical current density, JE, in a superconducting wire as a function of applied magnetic field orientation at 65 Kelvin and 3 Tesla. The top curve shows results from a newly published ORNL study. The other two curves are from previously reported record values. A minimum JE of 43.7 kiloamperes/cm2 (assuming a 50 micron thick stabilizer layer) and a minimum Ic of 455 Amperes/cm was obtained for all applied field orientations. This is the highest reported performance for a superconductor wire or a film on a technical substrate.
This figure shows the critical current, Ic, and engineering critical current density, JE, in a superconducting wire as a function of applied magnetic field orientation at 65 Kelvin and 3 Tesla. The top curve shows results from a newly published ORNL study. The other two curves are from previously reported record values. A minimum JE of 43.7 kiloamperes/cm2 (assuming a 50 micron thick stabilizer layer) and a minimum Ic of 455 Amperes/cm was obtained for all applied field orientations. This is the highest reported performance for a superconductor wire or a film on a technical substrate.

Abstract:
The ability to control nanoscale imperfections in superconducting wires results in materials with unparalleled and customized performance, according to a new study from the Department of Energy's Oak Ridge National Laboratory.

ORNL superconducting wire yields unprecedented performance

Oak Ridge, TN | Posted on August 16th, 2013

Applications for superconducting wires, which carry electricity without resistance when cooled to a critical temperature, include underground transmission cables, transformers and large-scale motors and generators. But these applications require wires to operate under different temperature and magnetic field regimes.

A team led by ORNL's Amit Goyal demonstrated that superconducting wires can be tuned to match different operating conditions by introducing small amounts of non-superconducting material that influences how the overall material behaves. Manipulating these nanoscale columns -- also known as defects -- allows researchers to exert control over the forces that regulate the wires' superconducting performance. The team's findings are published in Nature Publishing Group's Scientific Reports.

"Not only can we introduce these nanocolumn defects within the superconductor and get enhanced performance, but we can optimize the performance for different application regimes by modifying the defect spacing and density," Goyal said.

A wire sample grown with this process exhibited unprecedented performance in terms of engineering critical current density, which measures the amount of current the wire can carry per unit cross-sectional area. This metric more accurately reflects the real-world capabilities of the material because it takes into account the wire's non-superconducting components such as the substrate and the buffer and stabilizer layers, Goyal said.

"We report a record performance at 65 Kelvin and 3 Tesla, where most rotating machinery applications like motors and generators are slated to operate," he said.

The paper reports a minimum engineering critical current density at all applied magnetic field orientations of 43.7 kiloamperes/cm2, which is more than twice the performance level needed for most applications. This metric assumes the presence of a 50-micron-thick copper stabilizer layer required in applications.

Generating defects in the superconductor is accomplished through an ORNL-developed self-assembly process, which enables researchers to design a material that automatically develops the desired nanoscale microstructure during growth.

The mechanism behind this process, which adds very little to the production cost, was the subject of a recently published study by a team led by Goyal in Advanced Functional Materials.

"When you're making the wires, you can dial-in the properties because the defects self-assemble," Goyal said. "You change the composition of the superconductor when you're depositing the tape."

Goyal, who has collaborated with multiple superconducting technology companies, hopes the private sector will incorporate the team's findings to improve upon existing products and generate new applications.

The study is published as "Engineering nanocolumnar defect configurations for optimized vortex pinning in high temperature superconducting nanocomposite wires." Co-authors are ORNL's Sung Hun Wee and Claudia Cantoni and the University of Tennessee's Yuri Zuev.

The research was sponsored by DOE's Office of Electricity Delivery and Energy Reliability. The research was supported by ORNL's Shared Research Equipment (ShaRE) User Program, which is sponsored by DOE's Office of Science.

####

About Oak Ridge National Laboratory
ORNL is managed by UT-Battelle for the Department of Energy's Office of Science. DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.

For more information, please click here

Contacts:
Morgan McCorkle

865-574-7308

Copyright © Oak Ridge National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Download article:

Related News Press

News and information

Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th, 2015

Tel Aviv/Tsinghua University project uses crowd computing to improve water filtration: The research, a product of the new TAU-Tsinghua XIN Center, was conducted by 150,000 volunteers at IBM's World Community Grid July 6th, 2015

Transition from 3 to 2 dimensions increases conduction, MIPT scientists discover July 6th, 2015

A Stretchy Mesh Heater for Sore Muscles July 6th, 2015

Laboratories

Influential Interfaces Lead to Advances in Organic Spintronics July 1st, 2015

NIST ‘How-To’ Website Documents Procedures for Nano-EHS Research and Testing July 1st, 2015

Ultra-stable JILA microscopy technique tracks tiny objects for hours July 1st, 2015

X-rays and electrons join forces to map catalytic reactions in real-time: New technique combines electron microscopy and synchrotron X-rays to track chemical reactions under real operating conditions June 29th, 2015

Opening a new route to photonics Berkeley lab researchers find way to control light in densely packed nanowaveguides June 27th, 2015

Superconductivity

Making new materials with micro-explosions: ANU media release: Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th, 2015

Helium 'balloons' offer new path to control complex materials June 27th, 2015

Govt.-Legislation/Regulation/Funding/Policy

Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th, 2015

New technology using silver may hold key to electronics advances July 2nd, 2015

NIST Group Maps Distribution of Carbon Nanotubes in Composite Materials July 2nd, 2015

Ultra-stable JILA microscopy technique tracks tiny objects for hours July 1st, 2015

Self Assembly

Groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015

New conductive ink for electronic apparel June 25th, 2015

Giving atoms their marching orders: Highly homogeneous nanotube enforces single-file flow of atoms in gas diffusion. Direct comparison of single-file and Fickian diffusion possible with new system described by researchers at the University of South Carolina and University of Flor June 24th, 2015

n-tech Research Issues Report on Smart Coatings Market, Free Download Available on Firm’s Website June 24th, 2015

Discoveries

Fundamental observation of spin-controlled electrical conduction in metals: Ultrafast terahertz spectroscopy yields direct insight into the building block of modern magnetic memories July 6th, 2015

Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th, 2015

Transition from 3 to 2 dimensions increases conduction, MIPT scientists discover July 6th, 2015

A Stretchy Mesh Heater for Sore Muscles July 6th, 2015

Announcements

Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th, 2015

Tel Aviv/Tsinghua University project uses crowd computing to improve water filtration: The research, a product of the new TAU-Tsinghua XIN Center, was conducted by 150,000 volunteers at IBM's World Community Grid July 6th, 2015

Transition from 3 to 2 dimensions increases conduction, MIPT scientists discover July 6th, 2015

A Stretchy Mesh Heater for Sore Muscles July 6th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Fundamental observation of spin-controlled electrical conduction in metals: Ultrafast terahertz spectroscopy yields direct insight into the building block of modern magnetic memories July 6th, 2015

Surfing a wake of light: Researchers observe and control light wakes for the first time July 6th, 2015

Tel Aviv/Tsinghua University project uses crowd computing to improve water filtration: The research, a product of the new TAU-Tsinghua XIN Center, was conducted by 150,000 volunteers at IBM's World Community Grid July 6th, 2015

Transition from 3 to 2 dimensions increases conduction, MIPT scientists discover July 6th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project