Thermal Emissivity of Nuclear Graphite as a Function of its Oxidation Degree (3): Structural Study using Scanning Electron Microscope and X-Ray Diffraction
作者： Seung-Kuk Seo , Jae-Seung Roh , Suk-Hwan Kim , Se-Hwan Chi , Eung-Seon Kim
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摘要: We study the relationships between thermal emissivity of nuclear graphites (IG-110, PCEA, IG-430 and NBG-18) their surface structural change by oxidation using scanning electron microscope X-ray diffraction (XRD). The nonoxidized (0% weight loss) specimen had covered with glassy materials 5% 10% oxidized specimens, however, showed high roughness without materials. During binder were first then graphitic filler particles subsequently oxidized. 002 interlayer spacings non-oxidized specimens about 3.38~3.39A. There was a slight in crystallite size after compared to specimens. It difficult find relationship parameters obtained from XRD analysis. Keywords : Nuclear graphite, Oxidation, Emissivity, Microstructure, Structural
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