Liquid phase separation の履歴(No.7)

Liquid phase separation†

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Multi-step liquid phase separation†

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Figure 1
Schematic illustration of the multi-step liquid phase separation [1,5].

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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

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Liquid phaseb separation : Alloy system†

Fe-Cu

  1. T. Nagase, A. Yokoyama and Y. Umakoshi, J. of alloys and compounds, 509, 1178-1186 (2011)., "Formation of Macroscopically Phase Separated Cu-colored Melt-spun Ribbon in (Fe0.5Cu0.5)100-xBx (x = 0, 5, 10, and 20) Alloys", http://dx.doi.org/10.1016/j.jallcom.2010.09.168

Fe-Cu-B

  1. T. Nagase, A. Yokoyama and Y. Umakoshi, J. of alloys and compounds, 509, 1178-1186 (2011)., "Formation of Macroscopically Phase Separated Cu-colored Melt-spun Ribbon in (Fe0.5Cu0.5)100-xBx (x = 0, 5, 10, and 20) Alloys", http://dx.doi.org/10.1016/j.jallcom.2010.09.168

Fe-Cu-Si-B

  1. T. Nagase, M. Suzuki, T. Tanaka, Intermetallics, 61, 56-65 (2015)., "Formation of amorphous phase with crystalline globules in Fe-Cu-Si-B and Fe-Cu-Zr-B immiscible alloys", http://dx.doi.org/10.1016/j.intermet.2015.02.006
  2. 永瀬丈嗣, 鈴木賢紀, 田中敏宏, 材料, 64. 175-182 (2015)., "液相分離を示すFe-M-Si-B (M=Cu, Ag, Sn)急速凝固合金の組織", (T. Nagase, M. Suzuki, T. Tanaka, J. of the Society of Materials Science, 64. 175-182 (2015)., "Microstructure of rapidly solidified Fe-M-Si-B (M=Cu, Ag, Sn) immiscible alloys"), http://dx.doi.org/10.2472/jsms.64.175
  3. T. Nagase, Y. Umakoshi, J. of alloys and compounds, 495, L1-L4 (2010)., "Formation of melt-extracted wire of Fe-Cu-Si-B alloy with core-wire/surface-cover-layer structure by arc-melt-type melt-extraction method", http://dx.doi.org/10.1016/j.jallcom.2010.01.127

Fe-Cu-Nb-B

  1. T. Nagase, M. Suzuki, T. Tanaka, Journal of alloys and compounds, 619, 267-274 (2015)., "Formation of amorphous phase with crystalline globules in Fe-Cu-Nb-B immiscible alloys", http://dx.doi.org/10.1016/j.jallcom.2014.08.229

Fe-Cu-Zr-B

  1. T. Nagase, Y. Umakoshi, Surface and Interface Analysis, 48, 1252-1255 (2016)., "Microstructure of nano-crystalline globules embedded in an amorphous matrix in immiscible alloys", http://dx.doi.org/10.1002/sia.6090
  2. T. Nagase, M. Suzuki, T. Tanaka, Journal of alloys and compounds, 619, 332-337 (2015)., "Formation of nanoglobules with core-shell structure by liquid phase separation in Fe-Cu-Zr-B immiscible alloy", http://dx.doi.org/10.1016/j.jallcom.2014.08.138
  3. T. Nagase, M. Suzuki, T. Tanaka, Intermetallics, 61, 56-65 (2015)., "Formation of amorphous phase with crystalline globules in Fe-Cu-Si-B and Fe-Cu-Zr-B immiscible alloys", http://dx.doi.org/10.1016/j.intermet.2015.02.006
  4. T. Nagase, Materials Transactions, 55, 304-310 (2014)., Sharing publication - JIM(Japan Institute of Metals) and JFS(Japan Foundry Engineering Society), "Entangled Duplex Structure and Polycrystalline Globule Formation through Multistep Liquid-Phase Separation in Cu-Fe-Zr-B Alloys", http://dx.doi.org/10.2320/matertrans.F-M2013837l
  5. T. Nagase, A. Yokoyama and Y. Umakoshi, J. of alloys and compounds, 494, 295-300 (2010)., "Multi-Scale Crystalline Cu Globule Dispersed Fe-Based Metallic Glass Formation by Multi-Step Liquid Phase Separation", http://dx.doi.org/10.1016/j.jallcom.2010.01.015
  6. T. Nagase, A. Yokoyama, Y. Umakoshi, Mater. Trans, 47, 1105-1114 (2006)., "Formation of Nanocrystalline Globules and Metallic Glass in Fe70-xCuxZr10B20 (x=0～70) Alloys", http://dx.doi.org/10.2320/matertrans.47.1105

Fe-Ag-Si-B

  1. T. Nagase, M. Suzuki, T. Tanaka, Journal of alloys and compounds, 619, 311-318 (2015)., "Amorphous phase formation in Fe-Ag based immiscible alloys", http://dx.doi.org/10.1016/j.jallcom.2014.08.212
  2. 永瀬丈嗣, 鈴木賢紀, 田中敏宏, 材料, 64. 175-182 (2015)., "液相分離を示すFe-M-Si-B (M=Cu, Ag, Sn)急速凝固合金の組織", (T. Nagase, M. Suzuki, T. Tanaka, J. of the Society of Materials Science, 64. 175-182 (2015)., "Microstructure of rapidly solidified Fe-M-Si-B (M=Cu, Ag, Sn) immiscible alloys"), http://dx.doi.org/10.2472/jsms.64.175
  3. T. Nagase, Y. Umakoshi, Intermetallics 18, 2136-2144 (2010)., "Formation of dual-layer melt-spun ribbon through liquid phase separation", http://dx.doi.org/10.1016/j.intermet.2010.06.020

Fe-Sn-Si-B

  1. 永瀬丈嗣, 鈴木賢紀, 田中敏宏, 材料, 64. 175-182 (2015)., "液相分離を示すFe-M-Si-B (M=Cu, Ag, Sn)急速凝固合金の組織", (T. Nagase, M. Suzuki, T. Tanaka, J. of the Society of Materials Science, 64. 175-182 (2015)., "Microstructure of rapidly solidified Fe-M-Si-B (M=Cu, Ag, Sn) immiscible alloys"), http://dx.doi.org/10.2472/jsms.64.175

Cu-Ag-La-Fe

  1. 永瀬丈嗣, 寺井智之, 掛下知行, 松本恵, 藤居義和, 粉体および粉末冶金, 65, 45-51 (2018)., "Cu-Ag-La-Fe液相分離型アモルファス合金の組織と磁気的性質", https://doi.org/10.2497/jjspm.65.45

Co-Cu-Si-B

  1. T. Nagase, Y. Umakoshi, Journal of alloys and compounds, 650, 342-350 (2015)., "Microstructure of rapidly solidified Co-Cu-Si-B immiscible alloys with an amorphous phase", http://dx.doi.org/10.1016/j.jallcom.2015.07.230
  2. T. Nagase, Materials Transactions, 57, 156-162 (2016)., Sharing publication - JIM(Japan Institute of Metals and Materials) and JFS(Japan Foundry Engineering Society), "Formation of various type of globules in Co-Cu-Si-B immiscible alloy with an amorphous phase",http://dx.doi.org/10.2320/matertrans.F-M2015835
  3. T. Nagase, Y. Umakoshi, Intermetallics 18, 2136-2144 (2010)., "Formation of dual-layer melt-spun ribbon through liquid phase separation", http://dx.doi.org/10.1016/j.intermet.2010.06.020
  4. T. Nagase, Y. Umakoshi, J. of alloys and compounds, 505, L43-L46 (2010)., "Formation of macroscopic phase-separated dual-layer melt-spun ribbon from Co-Si-B-Cu alloy", http://dx.doi.org/10.1016/j.jallcom.2010.06.092

Co-Cu-Zr-B

  1. T. Nagase, Y. Umakoshi, Journal of alloys and compounds, 649, 1174-1181 (2015)., "Amorphous phase formation in Co-Cu-Zr-B based immiscible alloys", http://dx.doi.org/10.1016/j.jallcom.2015.07.229

Co-Cu-Zr-Ti-B

  1. 永瀬丈嗣, 馬越佑吉, 粉体および粉末冶金, 63, 217-222 (2016)., "Co-Cu-Zr-Ti-B合金系におけるアモルファス相形成", (T. Nagase, Y. Umakoshi, J. of the Japan Society of Powder Metallurgy, 63. 217-222 (2016)., "An Amorphous Phase Formation in Co-Cu-Zr-Ti-B Alloy System"), http://doi.org/10.2497/jjspm.63.217

Al-Pb

  1. T. Nagase, M. Takemura, M. Matsumuro, M. Matsumoto, Y. Fujii, Materials and Design, 117, 338-345 (2017)., "Microstructure of globules embedded in an amorphous phase in Al-Co-La-Pb immiscible alloys", http://dx.doi.org/10.1016/j.matdes.2016.12.092

Ti-Ag

  1. T. Nagase%, M. Matsumoto, Y. Fujii, Journal of Alloys and Compounds, 738, 440-447 (2018)., "Microstructure of Ti-Ag immiscible alloys with metastable liquid phase separation", https://doi.org/10.1016/j.jallcom.2017.12.138

Ti-Ag-Nb

  1. T. Nagase, M. Matsumoto, Y. Fujii, Microscopy, 66 S1, i22 (2017)., "Microstructure of Ti-Nb-Ag immiscible alloys with liquid phase separation", https://doi.org/10.1093/jmicro/dfx064

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