HAADF-STEM study on the early stage of precipitation in aged Al-Ag alloys

Toyohiko J. Konno; Eiji Okunishi; Tetsu Ohsuna; Kenji Hiraga

doi:10.1093/jmicro/dfh069

HAADF-STEM study on the early stage of precipitation in aged Al-Ag alloys

Toyohiko J. Konno, Eiji Okunishi, Tetsu Ohsuna, Kenji Hiraga

IMR - Institute for Materials Research (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We report on the structure of Ag precipitates in aged Al-Ag alloys using transmission electron microscopy and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Irregularly shaped small Ag particles of 1-2 nm dominate the alloy annealed at 140°C for 10 h. These particles are present also within large precipitates (10-50 nm), which are often characterized by their {100} and {110} facets. In addition, atomic-resolution HAADF-STEM images revealed that Ag atoms tend to form {111} planar clusters, which criss-cross a colony of the irregularly shaped small Ag precipitates.

Original language	English
Pages (from-to)	611-616
Number of pages	6
Journal	Journal of Electron Microscopy
Volume	53
Issue number	6
DOIs	https://doi.org/10.1093/jmicro/dfh069
Publication status	Published - 2004

Keywords

Al-Ag aged alloy
Guinier-Preston zone
HAADF-STEM
TEM

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10.1093/jmicro/dfh069

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title = "HAADF-STEM study on the early stage of precipitation in aged Al-Ag alloys",

abstract = "We report on the structure of Ag precipitates in aged Al-Ag alloys using transmission electron microscopy and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Irregularly shaped small Ag particles of 1-2 nm dominate the alloy annealed at 140°C for 10 h. These particles are present also within large precipitates (10-50 nm), which are often characterized by their {100} and {110} facets. In addition, atomic-resolution HAADF-STEM images revealed that Ag atoms tend to form {111} planar clusters, which criss-cross a colony of the irregularly shaped small Ag precipitates.",

keywords = "Al-Ag aged alloy, Guinier-Preston zone, HAADF-STEM, TEM",

author = "Konno, {Toyohiko J.} and Eiji Okunishi and Tetsu Ohsuna and Kenji Hiraga",

note = "Funding Information: TJK thanks the financial support provided by the inter-university cooperative research program of IMR, Tohoku University.",

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doi = "10.1093/jmicro/dfh069",

language = "English",

volume = "53",

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journal = "Journal of Electron Microscopy",

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TY - JOUR

T1 - HAADF-STEM study on the early stage of precipitation in aged Al-Ag alloys

AU - Konno, Toyohiko J.

AU - Okunishi, Eiji

AU - Ohsuna, Tetsu

AU - Hiraga, Kenji

N1 - Funding Information: TJK thanks the financial support provided by the inter-university cooperative research program of IMR, Tohoku University.

PY - 2004

Y1 - 2004

N2 - We report on the structure of Ag precipitates in aged Al-Ag alloys using transmission electron microscopy and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Irregularly shaped small Ag particles of 1-2 nm dominate the alloy annealed at 140°C for 10 h. These particles are present also within large precipitates (10-50 nm), which are often characterized by their {100} and {110} facets. In addition, atomic-resolution HAADF-STEM images revealed that Ag atoms tend to form {111} planar clusters, which criss-cross a colony of the irregularly shaped small Ag precipitates.

AB - We report on the structure of Ag precipitates in aged Al-Ag alloys using transmission electron microscopy and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Irregularly shaped small Ag particles of 1-2 nm dominate the alloy annealed at 140°C for 10 h. These particles are present also within large precipitates (10-50 nm), which are often characterized by their {100} and {110} facets. In addition, atomic-resolution HAADF-STEM images revealed that Ag atoms tend to form {111} planar clusters, which criss-cross a colony of the irregularly shaped small Ag precipitates.

KW - Al-Ag aged alloy

KW - Guinier-Preston zone

KW - HAADF-STEM

KW - TEM

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DO - 10.1093/jmicro/dfh069

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SN - 0022-0744

VL - 53

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EP - 616

JO - Journal of Electron Microscopy

JF - Journal of Electron Microscopy

IS - 6

ER -

HAADF-STEM study on the early stage of precipitation in aged Al-Ag alloys

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