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Method for producing improved an anisotropic magent through extrusion

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A method for producing an improved anisotropic magnet through an extrusion process wherein the container involved in the extrusion process is first coated, on its internal surface, with a material to prevent the bonding of the interior surface to the particle charge to be extruded and, thereby, to prevent cracking due to tensile stresses. In addition, an improved anisotropic extrusion product, with enhanced magnetic properties, can be obtained by holding the temperature of the extrusion product at temperatures between F. and F. for between 1 and 10 hours.
Chandhok, Vijay K. (Pittsburgh, PA)
10/ 275,221
November 4, 2002
[0001] This invention was made with government support under a small business research and development grant for "A Simple Process to Manufacture Grain Aligned Permanent Magnets" awarded by the U.S. Department of Energy (Grant No. DE-FG02-97-ER82313). The Government has certain rights to this invention.