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| Multi-step liquid phase separation | Nano-scale phase separated structure | Macroscopically phase separated melt-spun ribbon | Macroscopically phase separated wire |
Figure 1
Macroscopically phase separated melt-spun ribbon. Continuous rapidly solidified ribbon shows Co-Si-B amorphous / Cu crystal dual layer structure [1,2]
We firstly develop a dual-layer ribbon by conventional single-roller melt-spinning method [1,2]. In Co-Cu-Si-B melt-spun ribbon, the roll-side surface comprised Co-Si-B-based amorphous phase with Cu crystalline nanoscale globules, while the free surface showed a thin crystalline Cu layer. A macroscopically separated unique structure was obtained by the simultaneous occurrence of liquid phase separation of the Co-Cu-based alloy system and amorphous phase formation in the Co-Si-B alloy layer.
REFERENCE
[1] T. Nagase and Y. Umakoshi: J. of alloys and compounds, 505, L43-L46 (2010)., http://dx.doi.org/10.1016/j.jallcom.2010.06.092
[2] T. Nagase and Y. Umakoshi: Intermetallics 18, 2136-2144 (2010)., http://dx.doi.org/10.1016/j.intermet.2010.06.020
