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Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

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Core-shell structures and precipitation kinetics of Al3 (Sc, Zr) Li2 intermetallic phase in Al-rich alloy

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Title
Core-shell structures and precipitation kinetics of Al3 (Sc, Zr) Li2 intermetallic phase in Al-rich alloy
Author
Radmilović, V.Tolley A.Lee, ZonghoonDahmen, U.
Keywords
Al-Sc-Zr alloys; coarsening; core/shell precipitates; TEM; STEM
Issue Date
2006
Publisher
CROATIAN METALLURGICAL SOC
Citation
METALURGIJA, v.12, no.4, pp.309 - 314
Abstract
While binary Al-Sc alloys form Al3Sc intermetallic precipitates, ternary Al-Sc-Zr alloys develop precipitates that contain both Sc and Zr. Electron microscopy characterization using Z-contrast imaging indicates rapid initial formation of Al3(Sc, Zr) precipitates with a Sc-rich core followed by the slower development of a Zr-rich Al3(Zr, Sc) shell. The shell acts as a diffusion barrier, slowing down the rate of precipitate coarsening.
URI
http://scholarworks.unist.ac.kr/handle/201301/5031
ISSN
0543-5846
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