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首页> 外文会议>Ceramic materials for energy applications II >MICROSTRUCTURAL ANALYSIS OF NUCLEAR GRADE GRAPHITE MATERIALS
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MICROSTRUCTURAL ANALYSIS OF NUCLEAR GRADE GRAPHITE MATERIALS

机译：核级石墨材料的微观结构分析。

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Graphite materials under nuclear services undergo very significant irradiation effects including dimensional instability and modifications in various thermo- physical and mechanical properties'1'4'. Because these changes are resulting from the irradiation-induced structural changes the graphite in nano-, micro- and meso-scopic scales, it is essential to adequately characterize the materials' structures before and after neutron irradiation and to correlate the structural changes with the evolving macroscopic properties. Objective of this work is to characterize the microstructures of the as-fabricate fine-grained nuclear graphite manufactured by Tokai Carbon Co., Ltd. The graphite consists of filler cokes, binder, pores, and inherent cracks. The characteristic microstructures of the fine-grained isotropic graphite were determined by focusing on the attributes of these elements. Specifically, the sizes, shape factors, and the crystallographic anisotropy were evaluated so that these properties may be correlated with the thermophysical properties, macroscopic anisotropy, fracture properties, and the irradiation effects on them. In future work, these materials will be examined for various properties and microstructural changes by the neutron irradiation in the High Flux Isotope Reactor, Oak Ridge National Laboratory. This paper gives the initial results of microstructural evaluation for the pre-irradiated materials.
机译：核服务下的石墨材料会受到非常显着的辐照影响，包括尺寸不稳定性以及各种热物理和机械性能的改变'1'4'。由于这些变化是由辐照引起的结构变化导致的，因此，石墨具有纳米，微观和中观尺度，因此在中子辐照之前和之后充分表征材料的结构以及将结构变化与演化相关联至关重要。宏观特性。这项工作的目的是表征由Tokai Carbon Co.，Ltd.制造的细晶粒核石墨的微观结构。该石墨由填料焦炭，粘合剂，气孔和固有裂纹组成。通过关注这些元素的属性，确定了细粒各向同性石墨的特征微观结构。具体地，评估尺寸，形状因子和晶体学各向异性，以使这些性质可以与热物理性质，宏观各向异性，断裂性质以及对其的照射效果相关。在将来的工作中，将通过橡树岭国家实验室的高通量同位素反应堆中子辐照来检查这些材料的各种性能和微观结构变化。本文给出了预辐照材料的显微组织评估的初步结果。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Kentaro Takizawa; Yutai Katoh;

  • 作者单位

    Toshiaki Fukuda, Akira Kondo, Tokai Carbon Co. LTD., Japan;

    G E Jellison, Oak Ridge National Laboratory, USA;

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  • 正文语种 eng
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