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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.55  No.2 (2014)  >  pp.304-310

MATERIALS TRANSACTIONS
<<Previous article Vol.55  No.2 (2014)   pp.304 - 310 Next article>>

Entangled Duplex Structure and Polycrystalline Globule Formation through Multistep Liquid-Phase Separation in Cu–Fe–Zr–B Alloys

Takeshi Nagase1) 2)
1) Research Center for Ultra-High Voltage Electron Microscopy, Osaka University 2) Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

A unique entangled duplex structure was formed in rapidly solidified Cu–Fe–Zr–B alloys with Cu/Fe ratio = 1/1 and 6/1. Polycrystalline globules, embedded in a Cu crystalline matrix, were also observed in Cu35Fe35Zr10B20 and Cu60Fe10Zr10B20 alloys; this rapidly solidified structure was drastically different from that of Cu–Fe–Zr–B alloys enriched in Fe. Multi-step liquid phase separation can lead to unique microstructure formation during rapid solidification.


Keyword:
rapid solidification, liquid phase separation, trans-scale observation, iron–copper alloy

Received: May 13, 2013
Accepted: November 06, 2013 , Published online: January 25, 2014
Copyright © 2013 Japan Foundry Engineering Society

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