Study on the preparation techniques and properties of bonded magnetostrictive materials

Abstract

The preparation and measurement of the magnetoelastic properties of bonded Terfenol-D and Pr0.15Tb0.3Dy0.55Fe2 composites are reported. The experiments were carried out in various conditions, including compaction pressure and binder proportion in order to optimize the preparation method. The typical conditions are with the compaction pressure between 48 and 80 MPa and a weight ratio of binder to powder of 4:100. Large magnetostrictions of 1186×10−6 at 450 KA/m for the Terfenol-D composite with an applied compressive stress of 10 MPa and 900×10−6 at 900 KA/m for the Pr0.15Tb0.3Dy0.55Fe2 composite have been obtained with the following conditions: particle size of 165 μm, weight ratio of binder to powder of 4:100, and a compaction pressure of 80 MPa.

High magnetostriction at low fields of epoxy/Tb1−xPrx(Fe0.4Co0.6)1.9 composites

“…The epoxy/Tb 1−x Pr x (Fe 0.4 Co 0.6 ) 1.9 composites for x = 0.9-1.0 all have a high magnetostriction of about 500 ppm at 6 kOe, which is about the same as that of the Terfenol-D composite reported by Sandlund et al [10], smaller than the reported values in Refs. [19,20]. But the epoxy/Pr(Fe 0.4 Co 0.6 ) 1.9 composite free of high-cost heavy rare earth Tb and Dy, should have an economic predominance than Terfenol-D composite, making it a promising magnetostrictive composite material for application.…”

Structure and magnetostriction of melt-spun Pr0.3Tb0.7Fe2Bx alloys

“…The composite samples were prepared by crushed the melt-spun ribbons annealed at 773 K Table 1 The magnetization, coercivity and magnetostriction of Pr 0. 3 into powders and mixed with a phenol-type binder with the weight proportion of binder to powders of 4:100 [17]. The mixed powders were compacted under pressure of 80 MPa.…”

Structure and magnetic properties of melt-spun Tb0.27Dy0.73Fex ribbons

“…This discovery opened the era of technical applications for the large magnetoelasticity of rare earth metals. Since then, much research has been done to improve the magnetostriction and magnetic properties of this commercial compound to make it more suitable for applications [2][3][4][5][6][7]. Many researchers have paid attention to prepare the oriented Tb 0.3 Dy 0.7 Fe 2 alloy and substitute other atoms for Fe in Tb 0.3 Dy 0.7 Fe 2 alloy [8][9][10].…”