Tin Pest in Sn-0.5Cu Lead-Free Solder Alloys: A Chemical Analysis of Trace Elements

被引:0
作者
Monika Leodolter-Dworak
Ilse Steffan
William J. Plumbridge
Herbert Ipser
机构
[1] University of Vienna,Department of Analytical and Food Chemistry
[2] The Open University,Materials Engineering Department
[3] University of Vienna,Department of Inorganic Chemistry/Materials Chemistry
来源
Journal of Electronic Materials | 2010年 / 39卷
关键词
Metal and alloys; lead-free solders; aging; phase transformations; tin pest; chemical analysis;
D O I
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中图分类号
学科分类号
摘要
Two samples of Sn-0.5Cu solder alloys, stored at −18°C for 7 years, were chemically analyzed by an inductively coupled plasma-optical emission spectroscopy method. One of the samples was unaffected by this exposure; the other one had completely transformed into brittle α-Sn. Ten elements were found to exhibit statistically significant differences in their concentrations between the two samples, with the higher always associated with the untransformed sample. The highest concentrations were found for elements with an appreciable solubility in Sn, i.e., Bi, In, Pb, and Sb.
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页码:105 / 108
页数:3
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