About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Energy Materials for Sustainable Development
|
Presentation Title |
Bulk Nanostructured Oxide-metal Composites for Wind Turbines and Electric Vehicles |
Author(s) |
Javier Garay |
On-Site Speaker (Planned) |
Javier Garay |
Abstract Scope |
Permanent magnets (PMs) are essential to important renewable energy devices such as wind turbines and electric vehicles. Magnets with high rare earth (RE) contents such as Nd–Fe–B and Sm–Co and Pt containing phases are currently the state of the art PMs. Unfortunately, rare earth mining can environmentally detrimental, has supply chain issues and Pt is very expense. A promising solution is to use the so-called exchange-spring concept to replace expensive and threatened magnetic phases (such as REs or Pt) with more abundant and accessible materials. We present a simple, scalable synthesis route for producing exchange coupled soft/hard magnetic composite powder that outperforms pure soft and hard phase constituents. We demonstrate intimate mixtures of nanoscale hard oxide and Co–Fe (soft magnetic phase) with minimal reaction. The high-volume content of high-quality oxide/metal interfaces leads to magnetic exchange coupling in the composites. |