Structure of Rapidly Solidified Al–(0.25–2.0) wt % Bi Alloys

This article describes study of the microstructure and texture of aluminum alloy foils containing 0.25–2.0 wt % Bi and manufactured by high speed solidification. The cooling rate of the melt is at least 10 5  K/s. Aluminum texture (111) is generated in the foils. The average chord of cross sections...

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Bibliographic Details
Published in:Inorganic materials : applied research 2023-06, Vol.14 (3), p.720-723
Main Author: Shepelevich, V. G.
Format: Article
Language:English
Subjects:
Aluminum base alloys
Aluminum hydrides
Aluminum oxide
Ambient temperature
Bismuth
Chemistry
Chemistry and Materials Science
Cooling rate
Foils
Functional Coatings and Surface Treatment
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Precipitates
Rapid solidification
Texture
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Summary:This article describes study of the microstructure and texture of aluminum alloy foils containing 0.25–2.0 wt % Bi and manufactured by high speed solidification. The cooling rate of the melt is at least 10 5  K/s. Aluminum texture (111) is generated in the foils. The average chord of cross sections of bismuth spherical precipitates does not exceed 0.5 μm. The size of dispersed bismuth particles increases and their number per unit volume of aluminum matrix decreases with increase in the distance to the foil surface. The specific surface area of interface boundary at first increases and then decreases upon movement of solidification front. The alloy foils are dissolved in water at ambient temperature, forming hydrogen bubbles and amorphous powder of Al 2 O 3 ⋅5(H 2 O) and Al 2 O 3 ⋅3(H 2 O) aluminum hydrides.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113323030383