聚变堆用W在等离子体作用下的辐照损伤行为研究进展

刘伟, 陈婉琦, 马梦晗, 李恺伦

Review of Irradiation Damage Behavior of Tungsten Exposed to Plasma in Nuclear Fusion

LIU Wei, CHEN Wanqi, MA Menghan, LI Kailun

图11 氢泡在<100>刃型位错处的形核过程[59]

Fig.11 H blister nucleation process at <100> edge dislocation[59] (a) time t = 1 ns, the edge dislocation with a <100> Burgers vector is not filled by H atoms (The inset enlarged figure shows the dislocation core structure) (b) t = 5 ns, the dislocation core opens towards the <011> direction and accommodates more H atoms. The H-rich phase-transformation region is also formed at this stage (Inset shows the high magnified image of rectangular area) (c) t = 10 ns, the dislocation core extends further (d) t = 15 ns, with increased blister size, the phase-transformation region increases. The inset enlarged figure shows the crystal structure of the phase-transition region, which is fcc W with H filling all of its octahedral sites (e) t = 20 ns, the H dislocation diffusion path is visible (f) t = 25 ns, the final configuration is apparent; the phase-transition region grows continuously, following the blister tip (Inset shows the high magnified image of rectangular area)