MECHANICAL MILLING OF FE-B INTERMETALLICS

Mechanical milling of crystalline compounds and mechanical alloying of elemental components yield different products in the case of the Fe-B system. FeB and Fe2B cannot be amorphized by mechanical grinding. The appearance of the bcc Fe phase during mechanical milling of Fe2B is d ue not to decomposition into elemental components, but to contaminatio n from the milling tools. When the stoichiometry is changed, either by contamination during mechanical milling or by mechanical alloying of Fe+FeB or Fe+Fe2B powder mixture, an amorphous alloy is formed with co mposition close to Fe80B20.