Assessment of Fe-Ga-B alloy magnetomechanical behavior

作者：Bormio Nunes Cristina^*; Cardoso Fabio Martins

来源：Journal of Materials Research, 2018, 33(15): 2207-2213.

DOI：10.1557/jmr.2018.160

The Fe-18.6% Ga alloy (at.%) has a high magnetostriction and an excellent piezomagnetic (PZM) property. However, Fe-Ga has a poor ductility and the addition of B helps to improve this property. The magnetostriction of the Fe-Ga alloy is not appreciably improved by the addition of B; however, the PZM behavior of Fe-Ga-B is unknown up to now. Then, an Fe-Ga alloy with 2% of B was produced to evaluate the effect of boron addition on the PZM property of the Fe-Ga alloy. The PZM force sensing performance coefficient d(33)* decreased, but the maximum sensitivity is reached for a fixed magnetic field. In addition, d(33)* values are among 2 and 5 mT/MPa, which is sufficient for many applications. A better ductility compared to Fe-Ga and a good sensitivity at constant field, makes the alloy Fe-Ga-B a good candidate for application as force sensors up to stresses of 80 MPa.

• 出版日期2018-8-13