Fabrication of AI foam without thickening process through melt-foaming method
Fabrication of AI foam without thickening process through melt-foaming method作者机构：College of Mechanics and Materials Hohai UniversityNanjing 210098 Jiangsu China Suqian Research Institute of Hohai UniversitySuqian 223814 Jiangsu China
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2018年第25卷第1期
页 面：90-98页
核心收录：
学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0836[工学-生物工程] 082203[工学-发酵工程] 0822[工学-轻工技术与工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 083203[工学-农产品加工及贮藏工程]
基 金：This work is supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20171437). the Fundamental Research Funds for the Central Universities (Grant No. 2016B06614) the Research Project of University of Science and Technology Beijing (USTB) (Grant No. 2015-Z06). The Guiding Capi- tal lbr Industrial Development Project of Snqian and National Natural Science Foundation of China (No. 11472098)
主 题：Al foam Thickening agent Calcium carbonate Blowing gas Compression
摘 要：By using calcium carbonate （CaCO3） powder as the blowing agent, Al foams with porosities of - 60 to 85% and pore size of - 1.5 mm were fabricated via melt-foaming method. Instead of adding a thickening agent to increase Al melt viscosity, a small amount of Mg ingot （5.0 wt%） was added first, and then A1 melt was foamed by adding calcium carbonate via the impellor stirring. The effect of Mg addition on the gas release behavior of calcium carbonate in the Al melt was investigated. The compression behavior of fabricated Al foams was examined. The results show that the blowing gas is possibly from the reaction between Mg and calcium carbonate, and this reaction can produce solid oxides with micrometer level size, which leads to increasing the Al melt viscosity and is beneficial for inhibiting pores coarsening. Besides, the micrometer level cracks in the cell walls make the strength of Al foam decrease.
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