| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Influence of Spinodal Decomposition on the Magnetic Properties of Additively Manufactured Alnico. |
| Author(s) |
Saikumar Dussa, Sameehan S. Joshi, Krishna Verma, Chaitanya Kumar KN, Madhavan Radhakrishnan, Rajarshi Banerjee, Narendra B. Dahotre |
| On-Site Speaker (Planned) |
Saikumar Dussa |
| Abstract Scope |
Alnico permanent magnets are known for their high Curie temperature and superior magnetic properties at elevated temperatures. Due to the scarcity of rare earth elements, rare earth magnets are expensive. Enhancing coercivity and BHmax of Alnico could make them a viable alternative to rare earth magnets. In this study, Alnico magnets were fabricated using laser directed energy deposition (L-DED) from the elemental powder blend. Following L-DED, the samples were solutionized at 1250°C and water-quenched. Magnetic properties of Alnico arise from the spinodal decomposition of a single-phase α into α1(ferromagnetic) and α2(paramagnetic) phases. After solutionization, the temperature of spinodal decomposition is determined using differential scanning calorimetry. The heating and cooling rates are varied at 5 K/min, 25 K/min, and 50 K/min to study their effect on spinodal decomposition. Additionally, the holding time at the spinodal decomposition temperature is varied to investigate its impact on the spinodal decomposition microstructure and magnetic properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Magnetic Materials, Other |