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Magneto-carbonization method for production of carbon fiber, and high performance carbon fibers made thereby

United States Patent

9,725,829
August 8, 2017
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Method for the preparation of carbon fiber from fiber precursor, wherein the fiber precursor is subjected to a magnetic field of at least 3 Tesla during a carbonization process. The carbonization process is generally conducted at a temperature of at least 400.degree. C. and less than 2200.degree. C., wherein, in particular embodiments, the carbonization process includes a low temperature carbonization step conducted at a temperature of at least or above 400.degree. C. or 500.degree. C. and less than or up to 1000.degree. C., 1100.degree. C., or 1200.degree. C., followed by a high temperature carbonization step conducted at a temperature of at least or above 1200.degree. C. In particular embodiments, particularly in the case of a polyacrylonitrile (PAN) fiber precursor, the resulting carbon fiber may possess a minimum tensile strength of at least 600 ksi, a tensile modulus of at least 30 Msi, and an ultimate elongation of at least 1.5%.
Naskar; Amit K. (Knoxville, TN), Ozcan; Soydan (Oak Ridge, TN), Eberle; Claude C. (Knoxville, TN), Abdallah; Mohamed Gabr (Salt Lake City, UT), Mackiewicz Ludtka; Gail (Oak Ridge, TN), Ludtka; Gerard Michael (Oak Ridge, TN), Paulauskas; Felix Leonard (Knoxville, TN), Rivard; John Daniel Kennedy (Washington, DC)
UT-BATTELLE, LLC (Oak Ridge, TN)
13/ 833,834
20140265038
March 15, 2013
This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.