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

doi:10.1093/jmicro/51.Supplement.S245

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 journal › Article › peer-review

34 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.

Original language	English
Pages (from-to)	S245-S251
Number of pages	7
Journal	Journal of Electron Microscopy
Volume	51
Issue number	SUPPL.
DOIs	https://doi.org/10.1093/jmicro/51.Supplement.S245
Publication status	Published - 27 Mar 2002
Externally published	Yes

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title = "Quantitative study of Brownian motion of helium bubbles in fcc metals",

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.",

keywords = "Aluminium, Austenitic alloy, Diffusion, Helium bubble, In situ electron microscopy, Ion irradiation",

author = "K. Ono and K. Arakawa and K. Hojou and M. Oohasi and Birtcher, {R. C.} and Donnelly, {S. E.}",

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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

DO - 10.1093/jmicro/51.Supplement.S245

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VL - 51

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JO - Microscopy (Oxford, England)

JF - Microscopy (Oxford, England)

SN - 2050-5698

IS - SUPPL.

ER -

Quantitative study of Brownian motion of helium bubbles in fcc metals

Abstract

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