Effect of the elastic modulus of the matrix on the coupling of magnetostrictive composites

Abstract

The magnetomechanical coupling coefficient, k33, has been modeled as a function of the elastic modulus of the matrix, Em , of composite magnetostrictive materials. Measurements of k33 have been performed by a three-parameter technique on glass-matrix Terfenol-D composites fabricated from powders heated to 700°C in an inert atmosphere under the application of a 1-3 kN force. It is concluded that there is a value of Em for optimum magnetomechanical performance which is dependent on the volume fraction, Vf. The optimum value of Em is close to, but less than, the elastic modulus of the magnetostrictive materia

The formulation and processing of a thick-film magnetostrictive material

“…This is due to the magnetostrictive particles extending into the voids instead of operating against the matrix material. This is similar to the conclusion drawn by Busbridge et al [12] where Terfenol-D particles have been cast in a mould using glass to form the matrix. The presence of the voids around the particles had the effect of attenuating the magnetostriction to zero in their case.…”

Micromechanics-based magnetomechanical modeling of ferromagnetic-particle-reinforced active composites

“…Chen et al (1999) examined Tb 0.3 Dy 0.7 Fe 2 particles filled in various kinds of matrices and investigated the effect of the matrix's elastic modulus on the effective magnetostriction. Hudson et al (1998), Busbridge et al (2000) and Guo et al (2001) also studied the effect of the matrix's elastic modulus on the magnetomechanical coupling and effective magnetostriction of Terfenol-D composites. Duenas and Carman (2000; evaluated the magnetostrictive response and the effects of particle size and particle size distribution of Terfenol-D composites.…”

Influence of the Nb and V Addition on the Microstructure and Corrosion Resistance of the Fe-B-Co-Si Alloy

“…While in the case of modifying the composition of the metallic alloy, no significant improvement in properties was achieved [ 20 , 21 ] and in the case of composite materials with various matrices it was possible to reduce the brittleness and increase the range of operating frequency, while at the same time slightly decreasing the value of obtained magnetostriction. Most of the works devoted to composites focused on the use of various types of matrices, such as epoxy [ 22 , 23 ], phenolic [ 22 , 24 ], thermoplastic [ 25 ], or vinyl esters [ 26 ].…”