Quantitative study of Brownian motion of helium bubbles in fcc metals

K. Ono, K. Arakawa, K. Hojou, M. Oohasi, R. C. Birtcher, S. E. Donnelly

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Dynamical process of helium bubbles in face-centred cubic (fcc) metals has been studied by in situ irradiation and electron microscopy with a video recording system. Brownian type motion of helium bubbles was demonstrated quantitatively by establishing a proportional relation between the mean square of the bubble migration distance and time. This relation yielded the diffusion coefficient of the bubble. Examples of Brownian motion in the matrix and along general grain boundaries in pure aluminium are shown comparatively. Similar Brownian motion was also observed in an Fe-16Cr-17Ni austenitic alloy. It was revealed from scanning transmission electron microscopy-electron energy-loss spectroscopy that Cr was depleted around the bubble surface, but Ni was enriched. Response of the bubble motion to irradiation with high-energy self-ions was examined in pure aluminium and both effects of enhancement and retardation of the bubble mobility were found.

LanguageEnglish
PagesS245-S251
Number of pages7
JournalJournal of Electron Microscopy
Volume51
Issue numberSUPPL.
DOIs
Publication statusPublished - 27 Mar 2002
Externally publishedYes

Fingerprint

Helium
Brownian movement
bubbles
Metals
helium
Irradiation
Aluminum
Video recording
Electron energy loss spectroscopy
metals
Electron microscopy
Grain boundaries
Electron Energy-Loss Spectroscopy
Transmission electron microscopy
Video Recording
Scanning Transmission Electron Microscopy
Scanning electron microscopy
Ions
Electron Microscopy
aluminum

Cite this

Ono, K. ; Arakawa, K. ; Hojou, K. ; Oohasi, M. ; Birtcher, R. C. ; Donnelly, S. E. / Quantitative study of Brownian motion of helium bubbles in fcc metals. In: Journal of Electron Microscopy. 2002 ; Vol. 51, No. SUPPL. pp. S245-S251.
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abstract = "Dynamical process of helium bubbles in face-centred cubic (fcc) metals has been studied by in situ irradiation and electron microscopy with a video recording system. Brownian type motion of helium bubbles was demonstrated quantitatively by establishing a proportional relation between the mean square of the bubble migration distance and time. This relation yielded the diffusion coefficient of the bubble. Examples of Brownian motion in the matrix and along general grain boundaries in pure aluminium are shown comparatively. Similar Brownian motion was also observed in an Fe-16Cr-17Ni austenitic alloy. It was revealed from scanning transmission electron microscopy-electron energy-loss spectroscopy that Cr was depleted around the bubble surface, but Ni was enriched. Response of the bubble motion to irradiation with high-energy self-ions was examined in pure aluminium and both effects of enhancement and retardation of the bubble mobility were found.",
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Quantitative study of Brownian motion of helium bubbles in fcc metals. / Ono, K.; Arakawa, K.; Hojou, K.; Oohasi, M.; Birtcher, R. C.; Donnelly, S. E.

In: Journal of Electron Microscopy, Vol. 51, No. SUPPL., 27.03.2002, p. S245-S251.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Quantitative study of Brownian motion of helium bubbles in fcc metals

AU - Ono, K.

AU - Arakawa, K.

AU - Hojou, K.

AU - Oohasi, M.

AU - Birtcher, R. C.

AU - Donnelly, S. E.

PY - 2002/3/27

Y1 - 2002/3/27

N2 - Dynamical process of helium bubbles in face-centred cubic (fcc) metals has been studied by in situ irradiation and electron microscopy with a video recording system. Brownian type motion of helium bubbles was demonstrated quantitatively by establishing a proportional relation between the mean square of the bubble migration distance and time. This relation yielded the diffusion coefficient of the bubble. Examples of Brownian motion in the matrix and along general grain boundaries in pure aluminium are shown comparatively. Similar Brownian motion was also observed in an Fe-16Cr-17Ni austenitic alloy. It was revealed from scanning transmission electron microscopy-electron energy-loss spectroscopy that Cr was depleted around the bubble surface, but Ni was enriched. Response of the bubble motion to irradiation with high-energy self-ions was examined in pure aluminium and both effects of enhancement and retardation of the bubble mobility were found.

AB - Dynamical process of helium bubbles in face-centred cubic (fcc) metals has been studied by in situ irradiation and electron microscopy with a video recording system. Brownian type motion of helium bubbles was demonstrated quantitatively by establishing a proportional relation between the mean square of the bubble migration distance and time. This relation yielded the diffusion coefficient of the bubble. Examples of Brownian motion in the matrix and along general grain boundaries in pure aluminium are shown comparatively. Similar Brownian motion was also observed in an Fe-16Cr-17Ni austenitic alloy. It was revealed from scanning transmission electron microscopy-electron energy-loss spectroscopy that Cr was depleted around the bubble surface, but Ni was enriched. Response of the bubble motion to irradiation with high-energy self-ions was examined in pure aluminium and both effects of enhancement and retardation of the bubble mobility were found.

KW - Aluminium

KW - Austenitic alloy

KW - Diffusion

KW - Helium bubble

KW - In situ electron microscopy

KW - Ion irradiation

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U2 - 10.1093/jmicro/51.Supplement.S245

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M3 - Article

VL - 51

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JO - Microscopy (Oxford, England)

T2 - Microscopy (Oxford, England)

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SN - 2050-5698

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