中国物理B ›› 2020, Vol. 29 ›› Issue (4): 40704-040704.doi: 10.1088/1674-1056/ab7e99
所属专题: SPECIAL TOPIC — Ion beam technology
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
Shasha Lv(吕沙沙), Rui Zhu(朱睿), Yumeng Zhao(赵雨梦), Mingyang Li(李明阳), Guojing Wang(王国景), Menglin Qiu(仇猛淋), Bin Liao(廖斌), Qingsong Hua(华青松), Jianping Cheng(程建平), Zhengcao Li(李正操)
Shasha Lv(吕沙沙)1, Rui Zhu(朱睿)2, Yumeng Zhao(赵雨梦)3, Mingyang Li(李明阳)3, Guojing Wang(王国景)4, Menglin Qiu(仇猛淋)1, Bin Liao(廖斌)1, Qingsong Hua(华青松)1, Jianping Cheng(程建平)1, Zhengcao Li(李正操)5
摘要: The nickel-base alloy is one of the leading candidate materials for generation IV nuclear reactor pressure vessel. To evaluate its stability of helium damage and retention, helium ions with different energy of 80 keV and 180 keV were introduced by ion implantation to a certain dose (peak displacement damage 1-10 dpa). Then thermal desorption spectroscopy (TDS) of helium atoms was performed to discuss the helium desorption characteristic and trapping sites. The desorption peaks shift to a lower temperature with increasing dpa for both 80 keV and 180 keV irradiation, reflecting the reduced diffusion activation energy and faster diffusion within the alloy. The main release peak temperature of 180 keV helium injection is relatively higher than that of 80 keV at the same influence, which is because the irradiation damage of 180 keV, helium formation and entrapment occur deeper. The broadening of the spectra corresponds to different helium trapping sites (He-vacancies, grain boundary) and desorption mechanisms (different HenVm size). The helium retention amount of 80 keV is lower than that of 180 keV, and a saturation limit associated with the irradiation of 80 keV has been reached. The relatively low helium retention proves the better resistance to helium bubbles formation and helium brittleness.
中图分类号: (Thermal instruments and apparatus)