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*Liquid phase separation [#ie54848a] -[[Multi-step liquid phase separation>Liquid phase separation]] -[[Nano-scale phase separated structure]] -[[Macroscopically phase separated melt-spun ribbon]] -[[Macroscopically phase separated wire]] -------------------------- *Multi-step liquid phase separation [#n6bb17d0] #ref(http://t-nagase.sakura.ne.jp/pict/20151005/06-01-Multistep-model.jpg,left,nowrap,photo) ''Figure 1''~ ''Schematic illustration of the multi-step liquid phase separation [1,5].'' ~ #ref(http://t-nagase.sakura.ne.jp/pict/20151005/06-01-Fractal.jpg,left,nowrap,photo) ''Figure 2''~ ''Various-size Cu-globules dispersed Fe-based metallic glass. The unique fractal structure was formed through the multi-step liquid phase separation [4,5].'' ~ REFERENCES~ Recently, two-phase amorphous alloys have been obtained through liquid phase separation in La-Zr-Al-Ni-Cu[1], Y-Ti-Al-Co[2], and Ni-Nb-Y[3] by means of rapid solidification. In a multi-component alloy system, phase separation in a liquid state occurs first, after which each liquid region undergoes a liquid-to-glass transition, resulting in the formation of a two-phase amorphous alloy. These alloys systems also show an unique behavior of "multi-step liquid phase separation". Figure 1 shows the schematic illustration of multi-step liquid phase separation. We try to develop new metallic materials based on the concept of multi-step liquid phase separation in Fe-Cu and Co-Cu based alloys [4,5]. Figure 2 shows the typical example of Fractal-like structure formed by multi-step liquid phase separation in Fe-Zr-B-Cu alloys [4,5]. ~ REFERENCES~ [1] A.A Kundig, M. Ohnuma, D.H. Ping, T. Ohkubo, K. Hono, Acta Mater. 52, 2441 (2004).~ [2] B.J. Park, H.J. Chang, D.H. Kim, W.T. Kim: Appl. Phys. Lett. 85, 6353, (2004).~ [3] N. Mattern, U. Kuhn, A. Gebert, T. Gemming, M. Zinkevich, H. Wendrock, L. Schultz: Scripta Mater. 53, 271, (2005).~ [4] T. Nagase, A. Yokoyama and Y. Umakoshi: Mater. Trans, 47, 1105-1114 (2006). http://www.jim.or.jp/journal/e/47/04/1105.html~ [5] T. Nagase, A. Yokoyama and Y. Umakoshi: J. of alloys and compounds, 494, 295-300 (2010). http://dx.doi.org/10.1016/j.jallcom.2010.01.015~
