Abstract
Magnetic and mechanical properties of consolidated (hot pressed) gas atomized powders of Nd2Fe14B with TiC additions will be reported and the results correlated with microstructure. The fracture toughnesses obtained will be compared with similar tests on hot pressed hydrogenation, disproportionation, desorption, and recombination (HDDR) material, made by the HDDR process and with previously reported results on a variety of commercially available materials. TiC additions, by controlling grain growth, aid the gas atomization process and should result in better processability of consolidated magnets. Improvements in the fracture toughness and processability may lead to the use of the Nd2Fe14B magnets in special situations where it is necessary for the magnet to be highly stressed. For example, in electric vehicle drive motors, high rpm and small clearances preclude the use of supporting elements and result in high tensile forces on the magnet.
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