Glass formation and magnetic properties of Fe-C-Si-B-P-(Cr-Al-Co) bulk metallic glasses fabricated using industrial raw materials

摘要

Formation of Fe-C-Si-B-P-(Cr-Al-Co) bulk metallic glasses with enhanced glass-forming ability (GFA) and magnetic properties fabricated using industrial pig-iron and Fe-P alloys as raw materials has been studied. It was found that GFA of the pig-iron (Fe_(79.5)C_(18.0)Si_(2.3)P_(0.2), at%) could be improved by proper additions of only metalloids C, Si, P and B, and fully glassy structure was obtained in the Fe_(75.5)C_(7.0)Si_(3.3)B_(5.5)P_(8.7) alloy with a critical diameter of 1 mm. With suitable additions of metallic elements Cr, Co and Al, the GFA is further increased and fully amorphous rods in 4 mm diameter can be prepared for the Fe_(68.2)C_(7.0)Si_(3.3)B_(5.5)P_(8.7)Cr_(2.3)Al_(2.0)Co_(3.0) alloy that shows a unique combination of good soft-magnetic properties (M_s = 1.03T, H_c = 9.39 A/m), high GFA and high fracture strength. These low-cost Fe-based bulk metallic glasses fabricated using industrial raw materials have a potential to be utilized as engineering materials.