| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Enhanced Magnetostriction in Fe-Ga by Rapid Solidification and Ce Microalloying |
| Author(s) |
Mohammad Tauhidul Islam, Matthew A. Willard, Yumi Ijiri, Scott K. McCall |
| On-Site Speaker (Planned) |
Mohammad Tauhidul Islam |
| Abstract Scope |
Galfenol alloys exhibit the largest magnetostriction among rare-earth-free alloys, a property utilized in a wide range of sensor, sonar, and actuator applications. To further improve the Galfenol magnetostriction, we employed rapid solidification technique and microalloyed with Ce rare-earth metal. We prepared six samples of the (Fe81.7Ga18.3)100-xCex alloy with Ce composition of x = 0-0.5 at.% using melt-spinning method resulting BCC grains. The melt-spun ribbons of the Ce-free composition showed a lattice parameter of 0.2901 nm and 177 Am2/kg saturation magnetization. With increasing Ce content from 0 to 0.5 at.%, no significant trends were observed in lattice parameter or saturation magnetization value, due to the minimal amount of the microalloying constituent. The magnetostrictive strain (3/2λS) value for Fe81.7Ga18.3 showed 465 ppm, exceeding even the single crystal value (400ppm). Microalloying further enhanced this value, with the largest magnetostriction of 576 ppm observed at Ce 0.2 at.%. (Supported by LLNL under Contract DE-AC52-07NA2) |