TY - JOUR
T1 - Dynamic magnetomechanical properties of epoxy-bonded (Tb0.3Dy0.7)1-xPrxFe1.55 (0 ≤ x ≤ 0.4) pseudo-1-3 magnetostrictive composites
AU - Lv, Xiangke
AU - Or, Siu Wing
AU - Liu, Wei
AU - Liu, Xionghua
AU - Zhang, Zhidong
N1 - Funding Information:
This work was supported by the Joint Supervision Scheme with Mainland Universities of The Hong Kong Polytechnic University (A-PH79) and the National Nature Science Foundation of China (50331030 and 50571098).
PY - 2009/5/12
Y1 - 2009/5/12
N2 - Pseudo-1-3 magnetostrictive composites of 0.5 volume fraction are fabricated by embedding and aligning stabilizer (B, Co)-free, light rare earth (Pr)-contained magnetostrictive (Tb0.3Dy0.7)1-xPrxFe1.55 (0 ≤ x ≤ 0.4) particles with a size distribution of 10-300 μm in a passive epoxy matrix. The dynamic magnetomechanical properties of the composites with different Pr content x are investigated as a function of both bias field (=10-200 kA/m) and frequency (=25 Hz-70 kHz). The composites show similar qualitative trends in properties for all x with no frequency dispersion effect except for the resonance range. The dynamic relative permeability μr 33T demonstrates a decreasing trend with increasing x for the whole range of bias field due to the weakening of saturation magnetization with increasing Pr content. The two elastic moduli E3H and E3B, which result in negative-ΔE with maximum dynamic strain coefficient d33 and dynamic magnetomechanical coupling coefficient k33 near 140 kA/m bias in all composites, decrease with increasing x for all biases owing to the increasing compliance contribution from Pr. The (Tb0.3Dy0.7)0.75Pr0.25Fe1.55 composite exhibits the largest d33 and k33 at 140 kA/m bias as a result of the compensation for magnetocrystalline anisotropy.
AB - Pseudo-1-3 magnetostrictive composites of 0.5 volume fraction are fabricated by embedding and aligning stabilizer (B, Co)-free, light rare earth (Pr)-contained magnetostrictive (Tb0.3Dy0.7)1-xPrxFe1.55 (0 ≤ x ≤ 0.4) particles with a size distribution of 10-300 μm in a passive epoxy matrix. The dynamic magnetomechanical properties of the composites with different Pr content x are investigated as a function of both bias field (=10-200 kA/m) and frequency (=25 Hz-70 kHz). The composites show similar qualitative trends in properties for all x with no frequency dispersion effect except for the resonance range. The dynamic relative permeability μr 33T demonstrates a decreasing trend with increasing x for the whole range of bias field due to the weakening of saturation magnetization with increasing Pr content. The two elastic moduli E3H and E3B, which result in negative-ΔE with maximum dynamic strain coefficient d33 and dynamic magnetomechanical coupling coefficient k33 near 140 kA/m bias in all composites, decrease with increasing x for all biases owing to the increasing compliance contribution from Pr. The (Tb0.3Dy0.7)0.75Pr0.25Fe1.55 composite exhibits the largest d33 and k33 at 140 kA/m bias as a result of the compensation for magnetocrystalline anisotropy.
KW - Dynamic magnetomechanical properties
KW - Light rare earths
KW - Magnetostrictive alloys
KW - Magnetostrictive composites
KW - Stabilizing elements
UR - https://www.scopus.com/pages/publications/64549084603
U2 - 10.1016/j.jallcom.2008.08.066
DO - 10.1016/j.jallcom.2008.08.066
M3 - Journal article
SN - 0925-8388
VL - 476
SP - 271
EP - 275
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -