SYNTHESIS OF MULTICOMPONENT FE-BASED AMORPHOUS-ALLOYS WITH SIGNIFICANT SUPERCOOLED LIQUID REGION BY MECHANICAL ALLOYING

Mechanical alloying was utilized to synthesize multicomponent Fe-Al-P- B-C alloys. The resulting phases were characterized by X-ray diffracti on, differential scanning calorimetry, and isothermal annealing experi ments. Coexistence of an amorphous and a nanoscale b.c.c. phase with a n average grain size of about IO MI was found after milling. The amorp hous phase exhibits a rather wide supercooled liquid region before cry stallization. Some characteristic thermal properties of the different alloys are presented and the composition dependence of the glass trans ition temperature, the crystallization temperature and the crystalliza tion products are compared with data for rapidly quenched samples. (C) 1997 Elsevier Science S.A.