In high-temperature (>300°C) or highly corrosive environments, standard magnets fail due to demagnetization or oxidation. Samarium Cobalt Magnets (SmCo) are the preferred choice for aerospace, MRI machines, and military equipment due to their exceptional thermal stability and chemical inertness.
Key Parameter Comparison
| Parameter | Samarium Cobalt (SmCo) | Neodymium (NdFeB) |
|---|---|---|
| Max Operating Temp | 350°C | 200°C (standard) |
| Corrosion Resistance | Excellent (no coating needed) | Requires protection |
| (BH)max | 26–32 MGOe | 50–55 MGOe |
Typical Use Cases
Satellite Attitude Control: SmCo maintains magnetism in extreme space temperatures, ensuring stable satellite operation.
MRI Machines: Provide uniform high-strength magnetic fields for precision medical imaging.
Military Sensors: Operate reliably from -200°C to +300°C in battlefield conditions.
Selection Guide
SmCo 1:5 vs. SmCo 2:17: 1:5 is ideal for high-temperature scenarios (e.g., jet engines); 2:17 balances cost and performance (e.g., medical devices).
Manufacturing Process: Use powder metallurgy + HIP (Hot Isostatic Pressing) for material density and magnetic consistency.
CTA:
Download our SmCo Magnet Selection Guide to optimize magnet performance for your project!
