About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Advances in Dielectric Materials and Electronic Devices
|
Presentation Title |
Magnetocaloric Composites for High Efficiency Thermal Management |
Author(s) |
Christopher Kovacs, Timothy Haugan, Michael McLeod, Devin Grant |
On-Site Speaker (Planned) |
Christopher Kovacs |
Abstract Scope |
Cooling with magnetocaloric materials has been pursued by numerous agencies and companies, but many of the challenges remain unsolved. Some of these challenges are excessive pressure drop across the magnetocaloric regenerator, mechanical failure from magnetostructural and thermal cycling, and material degradation due to exposure. Presented here is a continuously processed powder-in-tube (PIT) composite in which the tube is a high thermal conductivity metal, and the core is dense GdF3. Using this PIT composite, the magnetocaloric material is not exposed to the external environment. Additionally, the metal sheathing keeps the magnetocaloric material in slight compression to prevent mechanical fatigue. The arrangement of these PIT wires into an axially aligned array results in a high effective thermal conductivity, low demagnetization factor, and low impedance regenerator, overcoming some of the most difficult challenges in proposed magnetocaloric systems. |