Title
Ag2Al plates in Al-Ag alloys
Abbreviated Journal Title
Z. Metallk.
Keywords
Al-Ag alloys; precipitates; scanning transmission electron microscopy; atomic number contrast; GUINIER-PRESTON ZONES; THERMODYNAMIC PROPERTIES; DIFFUSE-SCATTERING; INTERNAL STRUCTURE; AT.PERCENT AG; GAMMA-PLATES; GP-ZONES; SILVER; GROWTH; STEM; Metallurgy & Metallurgical Engineering
Abstract
The late stages of precipitation in aluminum-rich Al-Ag alloys with silver contents from 3 at.% to 22 at.% were studied with transmission electron microscopy. Shapes, sizes, and arrangements of plates of the stable hexagonal Ag2Al phase forming on {111} planes of the f.c.c. matrix were analysed. The high-angle annular dark-field contrast in scanning transmission electron microscopy is calibrated. This calibration allows for the quantitative measurement of plate thicknesses from high-angle annular dark-field scanning transmission electron micrographs of Ag2Al plates inclined to the electron beam. Results from these measurements are in good agreement with direct bright-field micrographs of plates viewed edge-on. For samples with silver contents above 12 at.% a parallel lamellar arrangement of fine gamma-plates and Al-rich matrix is found after extended heat treatments.
Journal Title
Zeitschrift Fur Metallkunde
Volume
97
Issue/Number
3
Publication Date
1-1-2006
Document Type
Article
Language
English
First Page
325
Last Page
328
WOS Identifier
ISSN
0044-3093
Recommended Citation
"Ag2Al plates in Al-Ag alloys" (2006). Faculty Bibliography 2000s. 6573.
https://stars.library.ucf.edu/facultybib2000/6573
Comments
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