The evolution of micro defects in He + irradiated FeCrNi alloy during isochronal annealing

Lu, Eryang; Cao, Xingzhong; Jin, Shuoxue; Zhang, Chunxiong; Zhang, Peng; Guo, Liping; Gong, Yihao; Wang, Boyu

doi:10.1016/j.nimb.2015.04.055

Cited by 5 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The W parameter of the high-dose (5 × 10 16 He + /cm 2 ) irradiated sample has a sudden increase at a depth of 62 nm. We speculated that this may be due to the accumulation of helium atoms in the defects caused by the irradiation and the formation of bubbles [24,[29][30][31]. For the sample irradiated by helium ions, on the one hand, the concentration of helium atoms increases, and on the other hand, vacancies are also increased.…”

Section: Resultsmentioning

confidence: 99%

Effects of He-D Interaction on Irradiation-Induced Swelling in Fe9Cr Alloys

Wang

Zhu

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

The atomic-scale defects such as (deuterium, helium)-vacancy clusters in nuclear energy materials are one of the causes for the deterioration of the macroscopic properties of materials. Unfortunately, they cannot be observed by transmission electron microscopy (TEM) before they grow to the nanometer scale. Positron annihilation spectroscopy (PAS) has been proven to be sensitive to open-volume defects, and could characterize the evolution of the size and concentration of the vacancy-like nanoclusters. We have investigated the effects of He-D interaction on the formation of nanoscale cavities in Fe9Cr alloys by PAS and TEM. The results show that small-sized bubbles are formed in the specimen irradiated with 5 × 1016 He+/cm2, and the subsequent implanted D-ions contribute to the growth of these helium bubbles. The most likely reason is that helium bubbles previously formed in the sample captured deuterium injected later, causing bubbles to grow. In the lower dose He-irradiated samples, a large number of small dislocations and vacancies are generated and form helium-vacancy clusters with the helium atoms.

show abstract

Section: Resultsmentioning

confidence: 99%