Kinetics of Ag-rich precipitates formation in Cu-Al-Ag alloys
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Data
2004-06-15
Autores
Adorno, A. T.
Guerreiro, M. R.
Silva, RAG
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
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. (C) 2004 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
microhardness, kinetics, diffusion, nucleation, Cu-Al-Ag alloys
Como citar
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. Lausanne: Elsevier B.V. Sa, v. 374, n. 1-2, p. 170-176, 2004.