中国物理B ›› 2021, Vol. 30 ›› Issue (8): 86102-086102.doi: 10.1088/1674-1056/ac0783
所属专题: SPECIAL TOPIC — Ion beam modification of materials and applications
Rui Zhu(朱睿)1,2, Qin Zhou(周钦)1,†, Li Shi(史力)1, Li-Bin Sun(孙立斌)1, Xin-Xin Wu(吴莘馨)1, Sha-Sha Lv(吕沙沙)3,‡, and Zheng-Cao Li(李正操)2
Rui Zhu(朱睿)1,2, Qin Zhou(周钦)1,†, Li Shi(史力)1, Li-Bin Sun(孙立斌)1, Xin-Xin Wu(吴莘馨)1, Sha-Sha Lv(吕沙沙)3,‡, and Zheng-Cao Li(李正操)2
摘要: Nickel-based alloys have been considered as candidate structural materials used in generation IV nuclear reactors serving at high temperatures. In the present study, alloy 617 was irradiated with 180-keV helium ions to a fluence of 3.6×1017 ions/cm2 at room temperature. Throughout the cross-section transmission electron microscopy (TEM) image, numerous over-pressurized helium bubbles in spherical shape are observed with the actual concentration profile a little deeper than the SRIM predicted result. Post-implantation annealing was conducted at 700 ℃ for 2 h to investigate the bubble evolution. The long-range migration of helium bubbles occurred during the annealing process, which makes the bubbles of the peak region transform into a faceted shape as well. Then the coarsening mechanism of helium bubbles at different depths is discussed and related to the migration and coalescence (MC) mechanism. With the diffusion of nickel atoms slowed down by the alloy elements, the migration and coalescence of bubbles are suppressed in alloy 617, leading to a better helium irradiation resistance.
中图分类号: (Doping and impurity implantation)