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SiC/SiO2 oxidation-resistant coatings on fuel element matrix graphite of high temperature gas-cooled reactor
Author(s): 
Pages: 27-30
Year: Issue:  4
Journal: HEAT TREATMENT OF METALS

Keyword:  高温气冷堆石墨SiC/SiO2复合涂层抗氧化性能;
Abstract: 提高高温气冷堆用石墨的抗氧化性能对改进高温气冷堆的安全性具有重要意义.通过热力学分析确认了SiC/SiO2,复合涂层在高温气冷堆正常服役条件和事故条件下均能保证其长期热稳定性.结合气相反应扩散法、泥浆浸渗法和高温氧化法,在高温气冷堆燃料元件基体石墨表面制备出SiC/SiO2复合涂层;对涂覆SiC/SiO2复合涂层的高温气冷堆燃料元件基体石墨在各种氧化条件下的氧化行为进行了分析.结果表明在高温气冷堆用石墨可能遇到的多种氧化条件下,SiC/SiO2复合涂层均能够保持长期稳定并显著改善基体石墨的抗氧化性能.
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