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CARBON NANOTUBE/METAL CARBIDE COMPOSITES WITH ENHANCED PROPERTIES

United States Patent Application

20120064341
A1
View the Complete Application at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Composite structures of carbon nanotubes (CNTs) and metal carbides include a helical nanotube/carbide composite fiber, and a film. The composite fiber was prepared by pulling/twisting carbon nanotubes from an array of nanotubes to form an as-spun fiber and soaking it a metal precursor solution, and then heating it under a reducing atmosphere with a carbon source. The composite fiber had a higher tensile strength, a higher conductivity, and a higher tensile modulus than the as-spun fiber. A composite structure in the form of parallel ribbons of aligned carbon nanotubes embedded in a film of NbC showed an enhanced conductivity along the CNT axial direction, and improved superconducting properties. The enhanced upper critical field of NbC/CNT suggested that the inclusion of CNTs in the NbC matrix reduced the coherence length of the NbC. Nanomechanical testing also demonstrated the potential for enhanced fracture toughness of NbC/CNT composites.
Zou, Guifu (Suzhou, CN), Zhang, Yingying (Beijing, CN), Burrell, Anthony Keiran (Naperville, IL), McCleskey, Thomas Mark (Los Alamos, NM), Jia, Quanxi (Los Alamos, NM)
LOS ALAMOS NATIONAL SECURITY, LLC (Los Alamos NM)
13/ 240,071
September 22, 2011
STATEMENT REGARDING FEDERAL RIGHTS [0002] This invention was made with government support under Contract No. DE-AC52-06NA25396 awarded by the U.S. Department of Energy. The government has certain rights in the invention.