Carbonates as Foaming Agent in Chip-based Aluminium Foam Precursor

被引：46

作者：

Haesche, Marco ^{[1
]}

Lehmhus, Dirk ^{[1
]}

Weise, Joerg ^{[2
]}

Wichmann, Manfred ^{[2
]}

Magnabosco Mocellin, Irene Cristina ^{[3
]}

机构：

[1] Univ Bremen, D-28359 Bremen, Germany

[2] Frannhofer IFAM, D-28359 Bremen, Germany

[3] Univ Fed Santa Catarina, Florianopolis, SC, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 09期

关键词：

Aluminium foam; Foaming agent; Calcium carbonate; Dolomite; Stabilisation;

D O I：

10.1016/S1005-0302(10)60135-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Replacement of TiH(2) as foaming agent by CaCO(3) (lime) and CaMg(CO(3))(2) (dolomite) for AlMg4.5- and AlSi9Cu3-foams was investigated considering influences on foaming capability and cellular structure. Precursor materials were produced from alloy chip and powder mixtures by means of the thixocasting process. AlSi9Cu3 variants showed expansion levels sufficient for commercial use. Variations in expansion observed when CaCO(3) and CaMg(CO(3))(2) were compared as foaming agent are explained based on the course of decomposition. Improved performance of dolomite-based foams relies on formation of stabilizing MgO phases, which do not develop during decomposition of CaCO(3) in Al-Si-Cu alloys

引用

页码：845 / 850

页数：6

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