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차세대 원자력 에너지 시스템을 위한 내방사선 성질의 비정질 금속 나노구조의 개발
Designing radiation-tolerant metallic glass nanostructure for next generation nuclear energy system

  • 사업명

    한국과학기술원운영경비

  • 과제명

    차세대 원자력 에너지 시스템을 위한 내방사선 성질의 비정질 금속 나노구조의 개발

  • 주관연구기관

    한국과학기술원
    Korea Advanced Institute of Science and Technology

  • 보고서유형

    최종보고서

  • 발행국가

    대한민국

  • 언어

    대한민국

  • 발행년월

    2015-12

  • 과제시작년도

    2015

  • 주관부처

    미래창조과학부
    Ministry of Science, ICT and Future Planning

  • 등록번호

    TRKO201600002212

  • 과제고유번호

    1711032530

  • DB 구축일자

    2016-06-04

  • DOI

    https://doi.org/10.23000/TRKO201600002212

  • 초록 


    1. Research Purpose
    Designed to operate at the elevated radiation doses and temperatures, the next generation nuclear energy ...

    1. Research Purpose
    Designed to operate at the elevated radiation doses and temperatures, the next generation nuclear energy systems, either fission or fusion, need to maintain their performance and functionality under the harsher environment than ever experienced before. Such requirement can be met only with a unprecedented progress in creating innovative structural materials capable of sustaining the radiation doses, e.g, up to 10 times higher than in the currently used reactors without losing mechanical stability under high temperature, pressure and corrosive conditions [1]. In the past a few decades, traditional materials-engineering methodologies, such as microstructural modification or alloying, have been successful in incrementally enhancing the radiation tolerance of structural metals and alloys used in the nuclear plants, but the demand to improve even further than now still remains. Recent advancement in nanotechnology offers another strong opportunity to fulfill such goals through controlling properties of materials utilizing the new principles only accessible at the nanometer-scale. One such example is to achieve the simultaneous increase of strength, ductility and radiation tolerance of metallic glasses (a.k.a. amorphous alloys) by scaling the extrinsic dimension of specimen down to a few tens of nanometer order [2,3].
    In the absence of crystallinity, the typical plasticity carriers in crystalline metals, the dislocations, are not allowed to exist in metallic glasses. Instead, the plastic deformation in metallic glasses is accommodated via collective atomic rearrangement process called shear transformation zone (STZ) (Figure 1) [4]. The activation of the STZs is largely determined by the local atomic packing density, i.e., they are more easily formed where the atoms are loosely packed. The non-uniform spatial distribution of the local atomic packing density (or equivalently excessive free volume) is possibly responsible for the ductility of metallic glasses, in which wider distribution of excessive free volumes tends to exhibit increased ductility in metallic glasses [4]. In addition, the relatively large empty spaces in those excess free volumes can possibly facilitate the trapping and self-healing of radiation damages, as is the case for several nanostructured bcc/fcc interfaces [1].


    ...


  • 목차(Contents) 

    1. 표지 ... 1
    2. 2015 Intl Joint Research Project Final Report ... 2
    3. 1. Research Purpose ... 3
    4. 2. Research Target Using Progress Chart ... 4
    5. Target of the year ... 4...
    1. 표지 ... 1
    2. 2015 Intl Joint Research Project Final Report ... 2
    3. 1. Research Purpose ... 3
    4. 2. Research Target Using Progress Chart ... 4
    5. Target of the year ... 4
    6. Long-term target ... 5
    7. 3. Research Method ... 6
    8. 3.1 Atomistic Simulation ... 6
    9. 3.2 Experiments ... 7
    10. 4. Research Results ... 8
    11. (1) Research achievements ... 8
    12. (2) Further research required ... 14
    13. References ... 15
    14. 끝페이지 ... 15
  • 참고문헌

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    2. 논문(0)
    3. 특허(0)
    4. 보고서(0)

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