Open AccessInfluences of Fe-Ga Alloy Crystallinity for the Application to a Magnetostrictive Vibration Energy Harvester
Author(s) -
Masahiko Ito,
T. Minamitani,
Takahiro Ueno
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1407/1/012113
Subject(s) - materials science , magnetostriction , crystallinity , alloy , vibration , crystal (programming language) , annealing (glass) , recrystallization (geology) , composite material , isotropy , acoustics , magnetic field , optics , computer science , paleontology , physics , quantum mechanics , biology , programming language
An isotropic poly-crystalline Fe-Ga alloy was fabricated using a short-time process and its performance as a magnetostrictive vibration energy harvester was evaluated. Grain enlargement due to recrystallization was observed by annealing treatment exceeding 1100 °C, but no contribution to physical properties and power generation performance was observed. It was confirmed that the magnetostrictive vibration energy harvester using poly-crystal functioned and an output of 1.1 mW was obtained under the vibration condition of a resonance frequency of 106 Hz and acceleration of 0.8 G. This is an output of 28% compared with the case of using a single crystal. In a trial calculation, poly-crystalline Fe-Ga alloy can be fabricated at a cost of 1/6 of a single crystal, so potential for using poly-crystal is expected in applications not requiring high output.