Development of Magnetic Actuator Materials for Energy Harvesting


  1. Dunlap, R.A.
  2. Hatchard, T.D.
  3. Thorne, J.S.
  4. Gaudet, J.M.
  5. Flynn, S.E.
  6. Maillet, M.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Dalhousie Univ, Halifax NS (CAN)
Magnetostrictive alloys are novel ‘smart materials that exhibit dynamic coupling of magnetic and mechanical properties. The dynamic magnetic-mechanical coupling phenomenon may make magnetostrictive alloys useful for transforming kinetic energy into magnetic energy to be harvested for electrical energy (and vice versa). This offers the potential for magnetostrictive alloys to be useful for development of efficient, cost-effective transducer, actuator, smart structure, vibration dampening and energy harvesting materials for military applications. Several low-cost processing approaches that produce highly-textured thin-form magnetostrictive Fe-Ga alloys were found to be promising for energy harvesting applications. Dalhousie University was contracted to evaluate several techniques for the production of magnetically active alloys and to evaluate the resultant thermal, magnetic and crystallographic properties of the alloys. This document summarizes the principal results from the final two years of the project and focuses primarily on development of Fe-Ga magnetostrictive alloys. Mechanical alloying (via ball milling) and rapid quenching (ribbon casting) were shown to be cost-effective methods for producing Fe-Ga compositions. The magnetic and crystallographic structures were fully characterized and show unique properties. 57FE Mossbauer hyperfine fields were shown to be particularly sensitive to atomic scale clustering (as a precursor to ordering). Highly-oriented fee

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Report Number
DRDC-ATLANTIC-CR-2009-117 — Contractor Report (Final Report)
Date of publication
01 Sep 2012
Number of Pages
Electronic Document(PDF)

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