Hysteresis and frequency response as limiting factors for efficient thermomagnetic energy conversion
Abstract
Magnetocaloric materials and magnetic refrigeration have been considered a promising alternative for temperature control during the last two decades. However, despite the broad variety of materials reported in the literature, this promising alternative has not materialized in the consumer market yet. The reason for this delay in reaching the market has different aspects, with the key limitations being related to the performance of the magnetocaloric materials. Materials with large magnetocaloric response usually have significant thermal hysteresis and suffer from complicated kinetics of phase transformations, limiting the frequency of the response. Both aspects are not fully understood, and the goal of this project is to develop a theoretical and experimental framework that sheds light onto the intrinsic and extrinsic factors involved in the thermal and magnetic cyclability of magnetocaloric materials with the final objective of making them suitable for applications. The materials that will be studied comprise Heusler and half-Heusler alloys, as they have promising magnetocaloric response seriously limited by hysteresis and kinetic effects, as well as newly developed high entropy alloys, which will allow an optimal combination of mechanical and functional properties. The temperature range for applications will expand from gas liquefaction, passing through room temperature applications up to high temperature applications for aircraft electronics cooling.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2023
- Source ID
- FA86552117044
Entities
People
- Victorino Franco
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Seville