Microstructural and elemental evolution of polycrystalline alpha-SiC irradiated with ultra-high-fluence helium ions before and after annealing
文献类型：期刊论文
| 作者 | Li, Bingsheng; Zhang, Chao; Liu, Huiping; Xu, Lijun; Wang, Xu; Yang, Zhen; Ge, Fangfang; Gao, Wen; Shen, Tielong |
| 刊名 | FUSION ENGINEERING AND DESIGN
 |
| 出版日期 | 2020 |
| 卷号 | 154 |
| 关键词 | TRANSMISSION ELECTRON-MICROSCOPY DEFECTS BEHAVIOR DAMAGE IMPLANTATION STRAIN ATOMS RAMAN GAN |
| DOI | 10.1016/j.fusengdes.2020.111511 |
| 英文摘要 | Helium atoms are the main reaction products that affect the properties of SiC, which is an important structural material used in the nuclear industry. Understanding the behaviour of helium in SiC is important for predicting the lifetimes of SiC in nuclear power systems. Unfortunately, the behaviour of SiC toward ultra-high concentrations (near 50 at.%) of helium have not been investigated extensively. In this study, polycrystalline alpha-SiC was irradiated with 300 keV He2+ ions at a fluence of 7.3 x 10(17) He2+/cm(2) at room temperature, followed by annealing at 900 degrees C and 1200 degrees C, with microstructural and elemental evolution investigated using transmission electron microscopy, energy-dispersive X-ray and Raman spectroscopies. The evolution of helium bubbles, as well as C and Si clusters were investigated by molecular dynamics simulations. Significant volume swelling occurred during helium irradiation, and the material recrystallised after annealing at 900 degrees C. Stacking faults and dislocation loops were observed in the recrystallised and crystalline layers, respectively. This work is expected to provide insight into the damage mechanism of SiC exposed to ultra-highfluence He ions and will provide references for the application of SiC in future advanced nuclear energy systems. |
| 学科主题 | Nuclear Science & Technology |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/19704]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Zhang, C (corresponding author), Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China. 2.Li, BS 3.Zhang, C (corresponding author), Anhui Univ Sci & Technol, Sch Mat Sci & Engn, Huainan 232001, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, Bingsheng,Zhang, Chao,Liu, Huiping,et al. Microstructural and elemental evolution of polycrystalline alpha-SiC irradiated with ultra-high-fluence helium ions before and after annealing[J]. FUSION ENGINEERING AND DESIGN,2020,154. |
| APA | Li, Bingsheng.,Zhang, Chao.,Liu, Huiping.,Xu, Lijun.,Wang, Xu.,...&Shen, Tielong.(2020).Microstructural and elemental evolution of polycrystalline alpha-SiC irradiated with ultra-high-fluence helium ions before and after annealing.FUSION ENGINEERING AND DESIGN,154. |
| MLA | Li, Bingsheng,et al."Microstructural and elemental evolution of polycrystalline alpha-SiC irradiated with ultra-high-fluence helium ions before and after annealing".FUSION ENGINEERING AND DESIGN 154(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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