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Carbonates as Foaming Agent in Chip-based Aluminium Foam Precursor 被引量:3

Carbonates as Foaming Agent in Chip-based Aluminium Foam Precursor
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摘要 Replacement of TiH2 as foaming agent by CaCO3(lime) and CaMg(CO3)2(dolomite) for AlMg4.5-and AlSi9Cu3-foams was investigated considering inluences 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 suffcient for commercial use.Variations in expansion observed when CaCO3 and CaMg(CO3)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 CaCO3 in Al-Si-Cu alloys Replacement of TiH2 as foaming agent by CaCO3(lime) and CaMg(CO3)2(dolomite) for AlMg4.5-and AlSi9Cu3-foams was investigated considering inluences 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 suffcient for commercial use.Variations in expansion observed when CaCO3 and CaMg(CO3)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 CaCO3 in Al-Si-Cu alloys
出处 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2010年第9期845-850,共6页 材料科学技术(英文版)
关键词 Aluminium foam Foaming agent Calcium carbonate DOLOMITE Stabilisation Aluminium foam Foaming agent Calcium carbonate Dolomite Stabilisation
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同被引文献23

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