Completeness of β-phase decomposition reaction in Cu-Al-Ag alloys

被引：29

作者：

Silva, R. A. G. ^{[1
]}

Machado, E. S. ^{[2
]}

Adorno, A. T. ^{[3
]}

Magdalena, A. G. ^{[3
]}

Carvalho, T. M. ^{[3
]}

机构：

[1] UNIFESP, Dept Ciencias Exatas & Terra, Diadema, SP, Brazil

[2] UFS, Itabaiana, SE, Brazil

[3] UNESP, Inst Quim, Araraquara, SP, Brazil

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2012年 / 109卷 / 02期

关键词：

Alloys; Phase transitions; Thermal behavior; beta-phase decomposition; MARTENSITIC-TRANSFORMATION;

D O I：

10.1007/s10973-011-1815-z

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The completeness of beta-phase decomposition reaction in the Cu-11wt%Al-xwt%Ag alloys (x = 0, 1, 2, and 3) was studied using differential scanning calorimetry (DSC), X-ray diffractometry (XRD), and optical microscopy (OM). The results indicated that beta-phase transformations are highly dependent on cooling rate and on the presence of Ag. On slow cooling, the silver presence prevents the beta- and beta(1)-phase decomposition; thus, inducing the martensitic phase formation. After rapid cooling, a new thermal event is observed and the reverse martensitic transformation is shifted to lower temperatures.

引用

页码：927 / 931

页数：5

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