Artigo
Precipitation reaction in alpha-Cu-Al-Ag alloys
Fecha
2011-01-01Registro en:
Matéria (Rio de Janeiro). Rede Latino-Americana de Materiais, v. 16, n. 3, p. 747-753, 2011.
1517-7076
S1517-70762011000300002.pdf
S1517-70762011000300002
10.1590/S1517-70762011000300002
WOS:000305880500002
Autor
Silva, Ricardo Alexandre Galdino da [UNIFESP]
Adorno, A.t.
Carvalho, T.m.
Magdalena, A.g.
Santos, C.m.a.
Institución
Resumen
The Ag-rich precipitates formation reaction in the Cu-9.22%at. Al-4.66%at. Ag, Cu-9.31%at. Al-5.83%at. Ag and Cu-9.37%at. Al-7.08%at. Ag alloys was studied using microhardness change measurements with temperature and time, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results indicated that the Ag-rich phase formation is an interface controlled process with a zero-order mechanism, due to the amount of unsolved Ag that makes the precipitation reaction rate independent of Ag concentration.