Role of hydrogen in stability and mobility of vacancy clusters in tungsten

Huang, Hao-Xuan; Li, Yu‐Hao; Li, Zhong-Zhu; Hou, Peng-Wei; Ma, Fang-Fei; Ren, Qing-Yuan; Zhou, Hong-Bo; Lü, Guang-Hong

doi:10.1007/s42864-022-00151-8

Cited by 13 publications

(1 citation statement)

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“…Growing bubbles can be interconnected to form new cavities. The high gas pressure inside these cavities, reaching several tens of GPa, is responsible for the development of blisters on the material surface [ 5 , 6 , 7 ]. He-filled nanovoids (bubbles) are considered to be the precursors to the formation of surface “fuzz”, leading to reduced thermal conductivity and potentially negatively impacting the material’s lifespan.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Rhenium Content on Helium Desorption Behavior in Tungsten–Rhenium Alloy

Liu,

Song,

Dong

et al. 2024

Materials

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To investigate the influence of different rhenium contents on the helium desorption behavior in tungsten–rhenium alloys, pure tungsten and tungsten–rhenium alloys were irradiated with helium under the same conditions. All irradiated samples were characterized using TDS and DBS techniques. The results indicate that the addition of rhenium can reduce the total helium desorption quantity in tungsten–rhenium alloys and slightly accelerate the reduction in the concentration of vacancy-type defects accompanying helium dissociation. The desorption activation energy of helium is approximately 2 eV at the low-temperature peak (~785 K) and about 4 eV at the high-temperature peak (~1475 K). An increase in rhenium content causes the desorption peak to shift towards higher temperatures (>1473 K), which is attributed to the formation of the stable complex structures between rhenium and vacancies. Besides, the migration of He-vacancy complexes towards traps and dynamic annealing processes both lead to the recovery of vacancy-type defects, resulting in a decrease in the positron annihilation S parameters.

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Section: Introductionmentioning

confidence: 99%