The mobility of small, over-pressurized helium bubbles in tungsten at 2000 K

2021 ◽  
pp. 153306
Author(s):  
Z.J. Bergstrom ◽  
D. Perez ◽  
E. Martínez
Keyword(s):  
Helium Bubbles

scholarly journals In-Situ TEM Annealing Observation of Helium Bubble Evolution in Pre-Irradiated FeCoNiCrTi0.2 Alloys

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3727
Author(s):  
Huanhuan He ◽  
Zhiwei Lin ◽  
Shengming Jiang ◽  
Xiaotian Hu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Vacuum Arc ◽  
In Situ Tem ◽  
Face Centered Cubic ◽  
Helium Bubble ◽  
High Entropy ◽  
Helium Bubbles ◽  
Transmission Electron ◽  
Bubble Evolution ◽  
Face Centered

The FeCoNiCrTi0.2 high-entropy alloys fabricated by vacuum arc melting method, and the annealed pristine material, are face centered cubic structures with coherent γ’ precipitation. Samples were irradiated with 50 keV He+ ions to a fluence of 2 × 1016 ions/cm2 at 723 K, and an in situ annealing experiment was carried out to monitor the evolution of helium bubbles during heating to 823 and 923 K. The pristine structure of FeCoNiCrTi0.2 samples and the evolution of helium bubbles during in situ annealing were both characterized by transmission electron microscopy. The annealing temperature and annealing time affect the process of helium bubbles evolution and formation. Meanwhile, the grain boundaries act as sinks to accumulate helium bubbles. However, the precipitation phase seems have few effects on the helium bubble evolution, which may be due to the coherent interface and same structure of γ’ precipitation and matrix.

On the migration of helium bubbles

1983 ◽  
Vol 78 (1-4) ◽  
pp. 381-383 ◽  
Author(s):  
P. J. Goodhew
Keyword(s):  
Helium Bubbles

PL Studies of Nanostructured Layers in Temperature - Pressure Treated Silicon Implanted with Helium

2004 ◽  
Vol 99-100 ◽  
pp. 255-258
Author(s):  
Barbara Surma ◽  
Andrzej Misiuk ◽  
Vito Raineri ◽  
A. Wnuk ◽  
J. Jagielski ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Defect Structure ◽  
Structural Evolution ◽  
Helium Bubbles ◽  
Nanostructured Layers ◽  
Oxygen Atoms

The effect of annealing under enhanced hydrostatic pressure (HT-HP treatment) on the structural evolution of nano-structured buried He-enriched layers in silicon was investigated by photoluminescence and TEM methods. It has been stated that the HT-HP treatment can affect the defect structure of nano-structured He-containing layer. Enhanced creation of helium bubbles during the HP-HT treatment takes place at HT £ 600oC. Annealing at HT ³ 800oC results in the accumulation (gettering) of oxygen atoms in the He implanted layer in Czochralski grown silicon. HP treatment stimulates this effect.

scholarly journals The Depths of Hydrogen and Helium Bubbles in Tungsten: A Comparison

2006 ◽  
Vol 50 (1) ◽  
pp. 43-57 ◽  
Author(s):  
K. O. E. Henriksson ◽  
K. Nordlund ◽  
A. Krasheninnikov ◽  
J. Keinonen
Keyword(s):  
Helium Bubbles
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