Kinetics of Ag-rich precipitates formation in Cu–Al–Ag alloys

The kinetics of Ag-rich precipitates formation in the Cu–2 wt.% Al alloy with additions of 2, 4, 6, 8, 10 and 12 wt.% Ag was studied using microhardness changes with temperature and time, differential scanning calorimetry (DSC), differential thermal analysis (DTA), scanning electron microscopy (SEM)...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2004-06, Vol.374 (1), p.170-176
Main Authors: Adorno, A.T., Guerreiro, M.R., Silva, R.A.G.
Format: Article
Language:English
Subjects:
Applied sciences
Cu–Al–Ag alloys
Diffusion
Exact sciences and technology
Hardness
Kinetics
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microhardness
Nucleation
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Summary:The kinetics of Ag-rich precipitates formation in the Cu–2 wt.% Al alloy with additions of 2, 4, 6, 8, 10 and 12 wt.% Ag was studied using microhardness changes with temperature and time, differential scanning calorimetry (DSC), differential thermal analysis (DTA), scanning electron microscopy (SEM), optical microscopy (OM), energy dispersive X-ray analysis (EDX) and X-ray diffractometry (XRD). The results indicated that an increase in the Ag content decreases the activation energy for Ag-rich precipitates formation, and that it is possible to estimate the values of the diffusion and nucleation activation energies for the Ag precipitates.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2004.02.006