Precipitation reaction in alpha-Cu-Al-Ag alloys

Materia

Santos, C.M.A.¹  Carvalho, T.M.¹  Adorno, A.T.¹  Magdalena, A.G.¹  Silva, R.A.G.² 

[1] UNESP, Araraquara;UNIFESP, Diadema

关键词: Ag additions;    Cu-based alloys;    kinetics.;   

DOI  :  10.1590/S1517-70762011000300002

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

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.

【 授权许可】

CC BY