SOFT-MAGNETIC PROPERTIES OF FE-B PREPARED BY MECHANICAL ALLOYING

Fe100-xBx(with x = 20, 25 and 50) samples were prepared by high energy ball milling. The phase distribution, thermal stability, saturation m agnetization and coercive force of these samples were examined by mean s of X-ray diffraction, differential scanning calorimetry and vibratin g sample and extraction magnetometries, respectively. An excellent sof t magnetic behavior, characterized by coercive forces of the order of 2.5 x 10(-5) T, was detected in the case of the Fe50B50 samples milled during times from 150 up to 200 hours. This soft magnetic behavior wa s correlated to the presence of an amorphous phase in the as-milled sa mple with composition close to the nominal one.