Formation and corrosion properties of Fe-based bulk metallic glasses

Chun-lei Zhu,Qing Wang,Jie Zhang,Ying-min Wang,and Chuang Dong School of Material Science and Engineering,Dalian University of Technology,Dalian 116024,China

摘 要：Bulk metallic glass（BMG） formation was explored in the Fe-B-Si-Nb alloy system though combined use of the atomic cluster line approach and the minor alloying strategy.The basic ternary compositions in the Fe-B-Si system were determined by the intersection points of two cluster lines,namely,Fe-B cluster to Si and Fe-Si cluster to B.3at%-4at% Nb was added to the quaternary Fe-B-Si-Nb alloy.The casting experiments revealed that good glass-forming ability（GFA） occurred at the（Fe73.4Si8.2B18.4）96Nb4 composition,and 3-mm diameter BMG samples were made.The glass transition temperature（Tg）,crystallization temperature（Tx）,and supercooled liquid region（ΔTx=Tx-Tg） of this BMG were measured to be 866,889,and 23 K,respectively.The BMG shows a high Vickers hardness of about Hv 1164,a Young’s modulus of 180 GPa,and a good corrosion resistance in the solutions of 1 mol/L HCl and 3wt% NaCl.

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