Magnetomechanical Properties Of Composite Materials With Giant Magnetostriction

Abstract

The aim of this work was to observe the changes in the magnetomechanical properties of composite materials with different Tb0.3Dy0.7Fe1.9 (Terfenol-D) powder particle-size distributions and varying volume fractions in the polyurethane matrix. The results show a direct relationship between the properties and the particle size of the Tb0.3Dy0.7Fe1.9 powder: the increases in the particle-size distribution of the Tb0.3Dy0.7Fe1.9 powder in the matrix amplify the magnetostrictive responses and the compressive modulus values. Moreover, it was found that the key role in efficiency of the transformation of magnetic energy into mechanical plays the initial compressing pre-stress.

Optical Fiber Current Sensors Based on FBG and Magnetostrictive Composite Materials

“…At the same time, when the volume fraction of particles is the same, the magnetostriction of composites with precompression stress of 10 MPa is greater than that of composites with pre-compression stress of 0 MPa. Tomiczek et al [30,31] studied the effects of TD particle size, particle volume fraction, and preloading stress on composites. Two kinds of samples with different particle size distribution, namely powder A with particle size of 38-106 µm and powder B with particle size of 106-212 µm, were manufactured by the author.…”