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Nano-scale Shell in Phase Separating Gd-Ti-Al-Co Metallic Glass
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  • Journal title : Applied Microscopy
  • Volume 43, Issue 2,  2013, pp.98-101
  • Publisher : Korean Society of Electron Microscopy
  • DOI : 10.9729/AM.2013.43.2.98
 Title & Authors
Nano-scale Shell in Phase Separating Gd-Ti-Al-Co Metallic Glass
Chang, Hye Jung; Park, Eun Soo; Kim, Do Hyang;
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In the present study, formation of yard and shell has been investigated in as-melt-spun alloy using a variety of transmission electron microscopy techniques. The phase separation during cooling leads to the formation of the microstructure consisting of amorphous droplets with different size scales embedded in the amorphous matrix. Due to the interdiffusion at the interface after the first-step phase separation, ~50 nm-thick yard develops on the surface of the primary droplet particle. Due to the critical wetting phenomenon, ~5 nm thickness shell enveloping the droplet forms. The sell is enriched in Co and Ti, implying that the composition is close to that of the droplet.
Metallic glass;Phase separation;Wetting;Shell;
 Cited by
Cahn J W (1977) Critical point wetting. J. Chem. Phys. 66, 3667. crossref(new window)

Chang H J, Yook W, Park E S, Kyeong J S, and Kim D H (2010) Synthesis of metallic glass composites using phase separation phenomena. Acta Mater. 58, 2483-2491. crossref(new window)

Hays C C, Kim C P, and Johnson W L (2000) Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions. Phys. Rev. Lett. 84, 2901-2904. crossref(new window)

Jayaraj J, Park J M, Gostin P F, Fleury E, Gebert A, and Schultz L (2009) Nano-porous surface states of Ti-Y-Al-Co phase separated metallic glass. Intermetallics 17, 1120-1123. crossref(new window)

Johnson W L (1996) Fundamental aspects of bulk metallic glass formation in multicomponent alloys. Mater. Sci. Forum 225-227, 35-50. crossref(new window)

Kim S Y, Jee S S, Lim K R, Kim W T, Kim D H, Lee E S, Kim Y H, Lee S M, Lee J H, and Eckert J (2011) Replacement of oxide glass with metallic glass for Ag screen printing metallization on Si emitter. Appl. Phys. Lett. 98, 222112-222112-3. crossref(new window)

Kim Y C, Na J H, Park J M, Kim D H, Lee J K, and Kim W T (2003) Role of nanometer-scale quasicrystals in improving the mechanical behavior of Ti-based bulk metallic glasses. Appl. Phys. Lett. 83, 3093-3095. crossref(new window)

Lee M H, Bae D H, Kim D H, and Sordelet D J (2003) Synthesis of Nibased bulk metallic glass matrix composites containing ductile brass phase by warm extrusion of gas atomized powders. J. Mater. Res. 18, 2101-2108. crossref(new window)

Lee M H, Lee J Y, Bae D H, Kim W T, Sordelet D J, and Kim D H (2004) A development of Ni-based alloys with enhanced plasticity. Intermetallics 12, 1133-1137. crossref(new window)

Lee M H and Sordelet D J (2006a) Nanoporous metallic glass with high surface area. Scripta Mater. 55, 947-950. crossref(new window)

Lee M H and Sordelet D J (2006b) Synthesis of bulk metallic glass foam by powder extrusion with a fugitive second phase. Appl. Phys. Lett. 89, 021921-021921-3. crossref(new window)

Lim K R, Kim W T, Lee E S, Jee S S, Kim S Y, Kim D H, Gebert A, and Eckert J (2012) Oxidation resistance of the supercooled liquid in Cu50Zr50 and Cu46Zr46Al8 metallic glasses. J. Mater. Res. 27, 1178-1186. crossref(new window)

Mattern N, Kuhn U, Gebert A, Gemming T, Zinkevich M, Wendrock H, and Schultz L (2005) Microstructure and thermal behavior of two-phase amorphous No-Nb-Y alloy. Scripta Mater. 53, 271-274. crossref(new window)

Park B J, Chang H J, Kim D H, and Kim W T (2004) In situ formation of two amorphous phases by liquid phase separation in Y-Ti-Al-Co alloy. Appl. Phys. Lett. 85, 6353-6355. crossref(new window)

Park B J, Chang H J, Kim D H, Kim W T, Chattopadhyay K, Abinandanan T, and Bhattacharyya S (2006) Phase separating bulk metallic glass: A hierarchical composite. Phys. Rev. Lett. 96, 245503. crossref(new window)

Park E S, Kim D H, Ohkubo T, and Hono K (2005) Enhancement of glass forming ability and plasticity by addition of Nb in Cu-Ti-Zr-Ni-Si bulk metallic glasses. J. Non-cryst. Solids 351, 1232-1238. crossref(new window)

Park E S, Jeong E Y, Lee J K, Bae J C, Kwon A R, Gebert A, Schultz L, Chang H J, and Kim D H (2007) In situ formation of two glassy phases in the Nd-Zr-Al-Co alloy. Scripta Mater. 56, 197-200. crossref(new window)

Xing L Q, Li Y, Ramesh K T, Li J, and Hufnagel T C (2001) Enhanced plastic strain in Zr-based bulk amorphous alloys. Phys. Rev. B 64, 180201. crossref(new window)