Magnetostrictive clad steel plates for high-performance vibration energy harvesting

Zhenjun Yang, Kenya Nakajima, Ryuichi Onodera, Tsuyoki Tayama, Daiki Chiba, Fumio Narita

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Energy harvesting technology is becoming increasingly important with the appearance of the Internet of things. In this study, a magnetostrictive clad steel plate for harvesting vibration energy was proposed. It comprises a cold-rolled FeCo alloy and cold-rolled steel joined together by thermal diffusion bonding. The performances of the magnetostrictive FeCo clad steel plate and conventional FeCo plate cantilevers were compared under bending vibration; the results indicated that the clad steel plate construct exhibits high voltage and power output compared to a single-plate construct. Finite element analysis of the cantilevers under bending provided insights into the magnetic features of a clad steel plate, which is crucial for its high performance. For comparison, the experimental results of a commercial piezoelectric bimorph cantilever were also reported. In addition, the cold-rolled FeCo and Ni alloys were joined by thermal diffusion bonding, which exhibited outstanding energy harvesting performance. The larger the plate volume, the more the energy generated. The results of this study indicated not only a promising application for the magnetostrictive FeCo clad steel plate as an efficient energy harvester, related to small vibrations, but also the notable feasibility for the formation of integrated units to support high-power trains, automobiles, and electric vehicles.

Original languageEnglish
Article number073902
JournalApplied Physics Letters
Volume112
Issue number7
DOIs
Publication statusPublished - 2018 Feb 12

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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