Retention and thermal desorption of helium in amorphous and crystalline FeBSi alloys

Xu, Qiu; Cao, Xingzhong; Sato, Koichi; Mori, Kazuhiro; Yoshiie, T.

doi:10.1080/09500830903485536

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…The peak at 780 K as shown in Fig. 2 (a) was related to the crystallization of amorphous FeBSi, which released trapped He from the amorphous free volume [14]. In addition, the peaks at about 970 K and 1220 K were attributed to trapped He being released from interstitial-related and void-related defects in amorphous alloy and interstitial-type dislocation loops and voids in crystalline alloy, respectively.…”

Section: Resultsmentioning

confidence: 94%

“…1 shows D2 thermal desorption from amorphous (a) and crystalline FeBSi (b) after 5 keV D2 irradiation to 1.0×10 20 D2/m 2 . In both alloys, only one peak appeared clearly at temperature of about 340 K, which was thought that D2 was trapped by the surface defects produced by the irradiation [14]. In addition, the background of D2 thermal desorption in amorphous alloy was higher than that in crystalline alloy at the temperature below 650 K.…”

Section: Methodsmentioning

confidence: 93%

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Investigation of the interaction of He and D in FeBSi alloy

Sato

Yoshiie

2013

Philosophical Magazine Letters

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He and H can be produced by nuclear reaction. In addition, energetic particles of He and T and D, which are isotopes of H, in the plasma of fusion reactor induce the damage in the surface of materials, such as erosion, sputtering and blistering. To investigate the interaction of He and D, amorphous and crystalline FeBSi alloys were irradiated by He or D2 or He+D2 ions with 5 keV. The results of thermal desorption indicated that more He atoms were trapped in both amorphous and crystalline alloy irradiated by He ions than D atoms in those alloy irradiated by D2 ions. Although He and D atoms were trapped FeBSi alloy irradiated by He+D2 ions, desorption peaks of D2 and He were separate. Absorption of D in amorphous alloy was influenced by the presence of He, however, absorption of He was independent of D2 irradiation in both alloys.

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Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 93%

Investigation of the interaction of He and D in FeBSi alloy

Sato

Yoshiie

2013

Philosophical Magazine Letters

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“…From this observation it was deduced that He alone is not able to form bubbles and that vacancies are required to provide the necessary space for expansion. Although point defects do not exist in amorphous materials, it is clear that vacancy-type defects can be formed by irradiation [21,23]. It is considered that the formation of He bubbles is caused by the migration of He atoms and vacancy-type defects in amorphous alloys.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, He implantation with a low energy (150 eV), without causing displacement damage, was carried out on amorphous alloy. The results of He thermal desorption from amorphous and crystalline FeBSi irradiated and implanted with 5 keV and 150 eV He þ ions, respectively, show that He peaks appear in the samples [21]. After irradiation, isochronal annealing and isothermal annealing experiments were carried out, and the microstructures of the amorphous and crystalline FeBSi samples were investigated using transmission electron microscopy (TEM).…”

Section: Methodsmentioning

confidence: 99%

Nucleation of He bubbles in amorphous FeBSi alloy irradiated with He ions

Sato

Yoshiie

2012

Philosophical Magazine Letters

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It is interesting to investigate the formation of He bubbles in amorphous alloys because point defects do not exist in amorphous materials. In the present study, the microstructural evolution of amorphous Fe 79 B 16 Si 5 alloy, either irradiated with 5 keV He þ ions or implanted with 150 eV He þ ions without causing displacement damage, and then annealed at a high temperature, was investigated using transmission electron microscopy (TEM). Vacancy-type defects were formed in the amorphous alloy after irradiation with 5 keV He þ ions, and He bubbles formed during annealing the irradiated samples at high temperature. On the other hand, for samples implanted with 150 eV He þ ions, although He atoms are also trapped in the free volume, no He bubbles were observed during annealing the samples even up to 873 K. In conclusion, the formation of He bubbles is related to the formation and migration of vacancy-type defects even in amorphous alloys.

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Retention and thermal desorption of helium in amorphous and crystalline FeBSi alloys

Cited by 2 publications

References 11 publications

Investigation of the interaction of He and D in FeBSi alloy

Investigation of the interaction of He and D in FeBSi alloy

Nucleation of He bubbles in amorphous FeBSi alloy irradiated with He ions

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