Novel Processing of Permanent Magnetic Materials via Dynamic Magnetic Compaction (DMC) Process to Obtain High Energy Density at High Temperature (300-

Current rare earth permanent magnets have proven to be in adequate for higher temperatures (300-500_C) military and Air Force applications. Development of permanent magnetic materials which can operate in high temperature regime will enable design of simpler, more efficient magnetic systems. The More Electric Aircraft (MEA) concept pursued by the US Air Force drives this need. We propose a novel processing route of powder compaction via Dynamic Magnetic Compaction (DMC) to increase the energy density of permanent magnetic materials of samarium-cobalt system and retain the performance at high temperature operation. The conventional processing routes yield high grain growth during sintering of compacted material and this may lead to performance deterioration at high temperatures (>500_C). The proposed DMC technique yields full density material thus eliminating sintering step and retaining the f ine grain size. The samarium cobalt materials will be processed via DMC technique and appropriately heat treated and performance will be measured and compared with the conventional material of the same composition. The success of this project yields high performance permanent magnetic materials capable of operating at high temperatures (300-500_C) and over the large temperature range -6O_C<T<500_C for use in important applications such as motors and generators and beargins. The More Electric Aircraft (MEA) and Integrated High Performance Turbine Engine Technology (IHPTET) require such materials. Applications of the generator and bearings shown above have very similar need in commercial air craf t industry . Another major commercial application for such materials is in electrical automobiles.