XRD Analysis of Radiation Damage Created by Energetic Sn Ions in Silicon Carbide Fiber

• 作者: Chen Yuguang Ding Zhaonan Huang Qing Li Jianyang Ma Baoshui Zhang Chonghong Zhang Liqing Zhang Xianlong
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报:英文版
• 学科: 物理学
• 关键词: fibers EXCITATION MODULUS
• 年，卷（期）: 2018,（1）
• 页码范围: 125-126
• 页数: 2页
• 分类号: O57

摘要

Silicon carbide(SiC)fiber possesses low neutron capture cross-section,low induced radioactivity,high thermal stability,low density,high specific strength,good oxidation-ablation resistance,high specific modulus,especially improved flaw tolerance and non-catastrophic mode of failure.Therefore,silicon carbide fiber is considered as a candidate structural component in advanced nuclear industry fields.The irradiation damage which silicon carbide fiber will experience cannot be ignored.In fission reactors,SiC fibers are inevitably subjected to irradiation by various fission fragments(heavy ions with up to hundreds of MeV)irradiation,which are produced via chain fission of the uranium.While in fusion reactors,the average energy of recoils produced by neutron irradiation in materials can reach several hundred keV.Most of the energy of fission fragments/recoils is deposited in the materials mainly through electronic processes(excitation and ionization of atoms along the trajectory of ions).Therefore,it is indispensable to acquire a comprehensive knowledge of the microstructure of SiC fibers under energetic-heavy-ion irradiation.