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Total. 7
No. Content
1
Quantitative Characterization of Phase Volume Fraction by EBSD Technique
  • Present EBSD pattern quality technique was combined with TEM and nano indentation to the characterization of complex microstructure,
  • especially in high strength DP, TRIP steel.
 
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 EBSD pattern quality map, Phase map and TEM HAADF images
2
Development of Giga scale low alloy high strength TWIP steel


  • The microstructure related mechanical properties of Fe-Mn-N steel were investigated and stacking fault energy which effects twin generation
  • were calculated using dislocation node.
 
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Twin image in 20% strained Fe-Mn steel 
3
Effect of Mg addition in the quasicrystalline-reinforced aluminum alloy composites fabricated by mechanical alloying
  • The addition of magnesium enhances the compressive yield strength of Quasicrystalline-reinforced aluminum alloy composite.
  • The main contribution of the strengthening is the dispersion hardening from the Al2CuMg phase in the Al matrix.
 
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TEM image of the Al2CuMg phase  Fe, Cu EDS map of the composite
4
A Study on diffusion barrier materials and electromigration of Cu
  • There are many materials which have been studied and developed for being a diffusion barrier against Cu, for example, nitrides of transition metals such as TaN, TiN, TiB2, and so on.
  • Electromigration is a major reliability concern in intergrated circuits due to the aggressive scaling of interconnect dimensions and the increasing current densities at operation.
 
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 PVD system for the metal-film growing
5
Improving soft magnetic property of FeSiBCuNb alloy in high frequency region
  • Partial crystallization and reduction of magnetostriction by adding Nb, Cr, Mo, and Cu
  • TEM analysis of nanocrystalline phase during annealing
 
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 Elemental distribution of FeSiBCuNb alloy
6
Microstructural changes of PZT with Ti/Zr ratio prepared sol-gel method
  • Magnetic properties depending on the microstructure of PZT
  • Observation of Pb depletion region in Ti/Zr ratio = 52/48 and 70/30
 
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 Phase changes of PZT according to Ti/Zr ratio
7
Analysis of intermediate-range arrangement of high strength ceramic fiber
  • High quality ceramic fibre can be fabricated by defect control. 
  • Measurment of nanovoid-density in the amorphous ceramic fiber dependent on the fiber diameter
 
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 Tensile test at high temperature  SEM images of Cu electroplated Silica fibers
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Seoul National University
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