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Nanobelts in multicomponent aluminum alloys
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Image of FIG. 1.
FIG. 1.

Backscatter electron SEM image of the alloy after heat treatment. A high density of fine Hf-containing precipitates (white) can be seen in addition to eutectic Si particles (gray) and Fe-containing particles (bright white).

Image of FIG. 2.
FIG. 2.

Low-magnification bright-field TEM (a) and HAADF STEM (b) images from the same alloy sample but different areas. Long nanobelt precipitates can be seen in both images in addition to platelike precipitates.

Image of FIG. 3.
FIG. 3.

(a) Intermediate HAADF STEM image showing one bent nanobelt precipitate which extends out of the aluminum edge and (b) a close-up of the square region in (a). (c) Line scan spectra along the line indicated in (b). (d) Electron diffraction pattern of the belt taken in TEM mode after tilting the belt to a low index crystal facet. Bright disk diffraction from center indicates the coexistence of an amorphous oxide structure on the belt surface. (e) HRTEM image of the belt showing two-dimensional lattice fringes and the measured interplanar spacing. The belt grows along [100]. (f) Cross sectional TEM image of a belt, showing a uniform thickness of .


Generic image for table
Table I.

Chemical composition of the belt precipitate calculated from the line scan spectra.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanobelts in multicomponent aluminum alloys