2007, Vol. 43

Issue (11): 1217-1220 DOI:

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. . Acta Metall Sin, 2007, 43(11): 1217-1220 .

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Abstract The (Tb0.36Dy0 64)1-xHoxFe2 magnetostrictive alloys with <110> orientation were prepared by zone melting directionally solidified method with a velocity of 240mm/h. The magnetostrictive performance and hysteresis of <110> aligned polycrystalline (Tb0.36Dy0 64)1-xHoxFe2 were investigated. An obvious magnetostriction “jump” effect was observed in these samples. The (Tb0.36Dy0.64)1-xHox Fe2 alloys (x<0.3) has the character of giant magnetostrictive with a wide operating temperature range from -60 to 80 oC. The hysteresis, represented by the width of magnetostriction versus the applied field, was reduced due to the addition of Ho. Compared to the Tb0.36Dy0.64Fe1.95 alloy with hysteresis of 104Oe, 135Oe, 166Oe under compressive stress of 0MPa, 5MPa, 10MPa , the magnetostriction hysteresis reduced to 93Oe, 116Oe, 137Oe, by 10.6%, 14.1%, 17.5% for Tb0.324Dy0.576Ho0.1Fe1.95, to 75Oe, 108Oe, 129Oe, by 27.9%, 20.0%, 22.3% for Tb0.288Dy0.512Ho0.2Fe1.95 and to 54Oe, 88Oe, 98Oe by 48.7%, 34.8%, 41.0% for Tb0.252Dy0.448Ho0.3Fe1.95, respectively.

Key words: TbDyHoFe alloys directional solidification Magnetostriction hysteresis

Received: 15 March 2007

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