Applied Microscopy

  • 제44권3호
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  • Pages.105-109
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  • 2014
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  • 2287-5123(pISSN)
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  • 2287-4445(eISSN)
한국현미경학회 (Korean Society of Microscopy)
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Synthesis of Amorphous Matrix Nano-composite in Al-Cu-Mg Alloy

  • Kim, Kang Cheol (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University) ;
  • Park, Sung Hyun (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University) ;
  • Na, Min Young (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Won Tae (Department of Optical Engineering, Cheongju University) ;
  • Kim, Do Hyang (Center for Non-crystalline Materials, Department of Materials Science and Engineering, Yonsei University)
  • 투고 : 2014.09.19
  • 심사 : 2014.09.22
  • 발행 : 2014.09.30
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초록

The microstructure of as-quenched $Al_{70}Cu_{18}Mg_{12}$ alloy has been investigated in detail using transmission electron microscopy. Al nano-crystals about 5 nm with a high density are distributed in the amorphous matrix, indicating amorphous matrix nano-composite can be synthesized in Al-Cu-Mg alloy. The high density of Al nano-crystals indicates very high nucleation rate and sluggish growth rate during crystallization possibly due to limited diffusion rate of solute atoms of Cu and Mg during solute partitioning. The result of hardness measurement shows that the mechanical properties can be improved by designing a nano-composite structure where nanometer scale crystals are embedded in the amorphous matrix.

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참고문헌

  1. Aburada T, Fitz-Gerald J M, and Scully J R (2011) Pitting and dealloying of solute-rich Al-Cu-Mg-based amorphous alloys: effect of alloying with minor concentrations of nickel. J. Electrochem. Soc. 158, C253-C265. https://doi.org/10.1149/1.3604392
  2. Greer A L (1994) Crystallization of metallic glasses. Mat. Sci. Eng. A-Struct. 179, 41-45.
  3. Greer A L (2001) Partially or fully devitrified alloys for mechanical properties. Mat. Sci. Eng. A-Struct. 304, 68-72.
  4. James P F (1975) Liquid-phase separation in glass-forming systems. J. Mater. Sci. 10, 1802-1825. https://doi.org/10.1007/BF00554944
  5. Kim S J, Kim S Y, Park J M, Heo J N, Lee J H, Lee S M, Kim D H, Kim W T, Lim K R, and Kim D (2012) Exploiting metallic glasses for 19.6% efficient back contact solar cell. Appl. Phys. Lett. 101, 064106. https://doi.org/10.1063/1.4742324
  6. Kundig A A, Ohnuma M, Ping D H, Ohkubo T, and Hono K (2004) In situ formed two-phase metallic glass with surface fractal microstructure. Acta Mater. 52, 2441-2448. https://doi.org/10.1016/j.actamat.2004.01.036
  7. Louzguine-Luzgin D V and Inoue A (2007) Investigation of a rapidly solidified Al-based nanocomposite with extremely high number density of precipitates. Mat. Sci. Eng. A-Struct. 449, 1026-1028.
  8. Mattern N, Kuhn U, Gebert A, Gemming T, Zinkevich M, Wendrock H, and Schultz L (2005) Microstructure and thermal behavior of two-phase amorphous Ni-Nb-Y alloy. Scr. Mater. 53, 271-274. https://doi.org/10.1016/j.scriptamat.2005.04.018
  9. 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. https://doi.org/10.1063/1.1842360
  10. Park B J, Chang H J, Kim D H, Kim W T, Chattopadhyay K, Abinandanan T A, and Bhattacharyya S (2006) Phase separating bulk metallic glass: a hierarchical composite. Phys. Rev. Lett. 96, 245503. https://doi.org/10.1103/PhysRevLett.96.245503