The effect of thermal oxidation on the coefficient of thermal expansion of nuclear graphite
文献类型：期刊论文
| 作者 | Yang, X; Wang, X; Tsang, DKL |
| 刊名 | JOURNAL OF MATERIALS SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 55期号:18页码:7805-7815 |
| 关键词 | PHYSICAL-PROPERTIES MICROSTRUCTURE IRRADIATION POROSITY DEFECTS TEMPERATURE DIFFUSION CORROSION BEHAVIOR MODULUS |
| ISSN号 | 0022-2461 |
| DOI | 10.1007/s10853-020-04577-8 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Nuclear graphite has been used in nuclear reactors for almost 80 years, its material behavior after oxidation and irradiation is still not fully understood. In this paper, an old question of why the oxidation has a considerable effect on Young's modulus but not on the coefficient of thermal expansion (CTE) is tried to be answered. The multi-scale finite-element method was used to analyze CTE dependence on various porosities, pore shape ratios and pore arrangements. The numerical results suggested that these factors have no significant influence on the CTE. Three different types of nuclear graphite samples were thermally oxidized at 525 degrees C. The microstructures of the graphite samples before and after oxidation were observed by using a laser scanning confocal microscope. The changes in sample volume, weight loss and CTE were measured after each oxidation period. The experimental results suggested that thermal oxidation at 525 degrees C was controlled by the in-pore diffusion-controlled regime and weight losses of up to 30% had no significant influence on CTE. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33192]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Div Mat Res, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Wuhan Univ, Dept Radiat Oncol, Renmin Hosp, Wuhan 430060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, X,Wang, X,Tsang, DKL. The effect of thermal oxidation on the coefficient of thermal expansion of nuclear graphite[J]. JOURNAL OF MATERIALS SCIENCE,2020,55(18):7805-7815. |
| APA | Yang, X,Wang, X,&Tsang, DKL.(2020).The effect of thermal oxidation on the coefficient of thermal expansion of nuclear graphite.JOURNAL OF MATERIALS SCIENCE,55(18),7805-7815. |
| MLA | Yang, X,et al."The effect of thermal oxidation on the coefficient of thermal expansion of nuclear graphite".JOURNAL OF MATERIALS SCIENCE 55.18(2020):7805-7815. |
入库方式： OAI收割
来源：上海应用物理研究所
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