Synthesis and characterization of bulk composite Fe-Si-B alloys with small concentration of Nb and Mo

doi:10.11890/1006-7191-106-401

Abstract

Abstract: The preparation and some mechanical, thermal and magnetic properties of the as cast bulk composite Fe₇₂B_19.2Si_4.8M₄ (M=Nb, Mo) alloys obtained by suction casting are presented and discussed. The microstructrural results showed the existence of a crystalline α-Fe(Si) phase embedded in a glassy matrix. The values of microhardness (H_v) and yield strength (σ_y) for the Nb-containing alloy are exceptionally high, i.e. (12.65±0.3) GPa and (4.22±0.10) GPa, respectively. The saturation polarization values are found to be as high as 1.24 T for both composite alloys. It is thought that the interplay between the secondary crystalline phases and amorphous matrix could be responsible for the mechanical and magnetic behaviour of these alloys.

Key words: Bulk composite alloys, Magnetic properties, Mechanical properties, Thermal stability and suction casting

S. Baez, I. Betancourt, I.A. Figueroa. Synthesis and characterization of bulk composite Fe-Si-B alloys with small concentration of Nb and Mo[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(6): 401-408.

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