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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM
  • Insitu-TEM characterization of carbon-based materials using nanofactory STM holder for Li-ion battery application
  • Structural characterization of mesoporous materials using SEM & TEM
  • Interface analysis between various oxides and metals through Cs-corrected (S)TEM
  • Resistive switching mechanism of graphene oxide thin films for RRAM application

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Effect of Ce addition on the microstructure and tensile properties of extruded Mg-Zn-Zr alloys

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Title
Effect of Ce addition on the microstructure and tensile properties of extruded Mg-Zn-Zr alloys
Author
Jeong, Hu YoungKim, BeomcheolKim, Sung–GeunKim, Hyeon JuPark, Sung Soo
Issue Date
2014-08
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.612, pp.217 - 222
Abstract
The microstructure and tensile properties of extruded Mg-Zn-Zr-Ce alloys with different Ce contents were investigated. Ce addition to ternary Mg-Zn-Zr alloy resulted in significant grain refinement as well as a change in the type of second phase particles from MgZn to Ce(Mg1-xZnx)11, which has a C-centered orthorhombic structure with lattice parameters of a=0.999nm, b=1.146nm, and c=0.976nm. However, fine MgZn2 precipitates were found to exist in the extruded alloys regardless of the level of Ce content. The yield and ultimate strengths of the extruded alloys were significantly increased by Ce addition although the presence of coarse Ce(Mg1-xZnx)11 particles has an adverse effect on ductility.
URI
https://scholarworks.unist.ac.kr/handle/201301/5301
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84903764266
DOI
10.1016/j.msea.2014.06.054
ISSN
0921-5093
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