|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Size-Scaled High-Performance Alnico Magnets with Enhanced Mechanical Properties and Near-Final Shape
||Liangfa Hu, Iver Anderson, Aaron Kassen, Emma White, Wei Tang, Lin Zhou, Matt Kramer
|On-Site Speaker (Planned)
The prospect of scaling up a near-final shape manufacturing process for alnico magnets using pre-alloyed powder was examined. Pre-alloyed powder processing is being developed to manufacture large, up to 66 mm (2.6 in.) in length, bulk magnets of a modified alnico 8 composition. Existing results showed that partially aligned anisotropic alnico magnets in near-final shapes could be made by a binder-assisted compression molding method from spherical, pre-alloyed powder by de-binding, sintering, a novel biased grain growth method, magnetic annealing, and drawing. A new systematic study of processing parameters for producing magnets of greatly enlarged near-final shapes suggested an effective set of conditions to minimize density gradients in the bulk magnets and to achieve improved alignment. Both magnetic and mechanical tests suggested enhanced properties of the present alnico magnets in comparison with commercial counterparts. Work funded by USDOE-EERE-VT-EDT program through Ames Lab contract no. DE-AC02-07CH11358.