Supercritical Phase Transformations for Multiferroic Materials
Abstract
The goal of this proposal is to investigate the phenomenon of supercritical martensitic phase transformations for multiferroics with exceptionally reversible and low hysteretic behaviors. Many multiferroics from ceramics to metals to elastomers owe their unique functionality to a reversible martensitic phase transformation, the advantages of which include an ability to switch between distinct electrical-magnetic properties via thermal or mechanical biasing, and, conversely, convert the energy of electric-magnetic fields to high frequency actuation. Normally, martensitic phase transformations take place via the nucleation and propagation of sharp phase interfaces, and energy barriers associated with these processes lead to hysteresis and functional fatigue. New research suggests that, when the material exists in a supercritical state, the transformation takes place via a gradual transformation of the lattice, i.e., without any interfaces. As a result, these supercritical multiferroics exhibit exceptional reversibility and low hysteretic or “anhysteretic� behaviors with up to 15percent recoverable deformation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310138
Entities
People
- Ashley Bucsek
Organizations
- Air Force Office of Scientific Research
- Board of Regents of the University of Michigan
- United States Air Force