Abstract
The powders of (Tb0.5Dy0.5)(Fe1-xCrx)1.8 (x=0-0.2) were synthesized by a mechanical alloying (MA) of the elemental Tb, Dy, Fe and Cr powders using a planetary ball milling for 360 ks, and they were consolidated at 1273 K by a pulsed current sintering (PCS). The Cr addition was very effective to improve compressive strength of the sintered alloys, which is thought to be attributed to the formation of ductile Fe-Cr phase. On the other hand, the Cr addition of x = 0.2 decreased magnetostriction of the alloys due to an excess amount of Fe-Cr phase. As a result, it was found that the optimum Cr content is x = 0.05 for achieving large magnetostriction (380 ppm at 112 kA/m) and high compressive strength (800 MPa) simultaneously.
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