Ag-rich phase formation in the Cu-6 wt% Al alloy with Ag additions

Carvalho, T. M. [UNESP]; Adorno, A. T. [UNESP]; Silva, R. A. G. [UNESP]

Ag-rich phase formation in the Cu-6 wt% Al alloy with Ag additions

Data

2008-08-01

Autores

Carvalho, T. M.

Adorno, A. T.

Silva, R. A. G.

Editor

Pergamon-Elsevier B.V. Ltd

Tipo

Artigo

Direito de acesso

Acesso restrito

Resumo

Ag-rich phase formation in the Cu-6 wt% Al alloy with additions of 4, 6, 8, 10, and 12 wt% Ag was studied using microhardness changes with temperature and time, differential thermal analysis (DTA), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), and X-ray diffractometry (XRD). The results indicated that the Ag-rich phase formation follows two different processes depending on Ag concentration. For alloys with 4 and 6 wt% Ag the precipitate formation occurs as a second-order mechanism while for alloys with 8, 10 and 12 wt% Ag a zero-order reaction was observed. (C) 2008 Elsevier Ltd. All rights reserved.