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Nanostructured Materials Lab

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Preparation of cast-​iron-​based nanocrystalline alloy with Cu and Nb …

Abstract
The effect of minor Cu and Nb addition on glass-forming ability and nanocrystallization behavior of castiron-
based bulk metallic glass was investigated. With simultaneous Cu and Nb addition, the crystallization
kinetics of the amorphous alloys adequately modified to have enlarged initial nucleation rate and
reduced growth rate of the primary a-Fe phase. However, due to the increased tendency to form secondary
Fe3C and Fe2P phase, the cast-iron-based bulk metallic glass with combined Cu and Nb addition
had a reduced processing window for nanocrystallization. Also, the simultaneous Cu and Nb addition
decreased glass-forming ability of the alloy. Thus, it was revealed that the classical nanocrystallization
strategy introducing combined Cu and Nb addition is not a suitable alternative to facilitate nanocrystallization
of cast-iron-based bulk metallic glasses.