铸造2025，Vol.74Issue(6)：767-775,9.
熔体发泡法制备泡沫铝增黏过程优化及机理研究
Research on Optimization and Mechanism of Viscosity Enhancement Process in Aluminum Foam Preparation by Melt Foaming Method
摘要
Abstract
In order to further optimize and accurately control the pore structure of aluminum foam,orthogonal experiments were designed for the viscosity increasing stage during the melt foaming process.Through the analysis of the porosity and pore structure of the obtained samples,it was determined that the optimal viscosity increasing parameters were 2％ Ca addition,700 r/min viscosity increasing stirring speed,700 ℃ viscosity increasing stirring temperature and 4 min viscosity increasing stirring time.Among the four factors,Ca addition had the greatest influence on porosity.The pore radius and roundness of the sample 8 were the best.The density of the sample 8 was 0.45 g/cm3,the porosity was 83.2％,the pore roundness was concentrated between 0.8 and 0.9,accounting for 51.5％ of the total,and the equivalent radius of the pores was concentrated between 0.5 and 1mm,accounting for 54.7％ of the total.When the viscosity enhancement stirring temperature was increased,the pore size became larger;when the viscosity enhancement stirring speed was increased,the roundness of the pores was better.The mechanism of the reaction between Ca and Al showed that the intermetallic compound Al4Ca played an important role in increasing the viscosity of the melt.The formation phase obstructed the growth of bubbles,affected the growth direction,and made bubbles grow into spindle shapes.关键词
泡沫铝/熔体发泡法/增黏剂/泡孔结构/微观分析Key words
closed-cell aluminum foam/melt foaming method/viscous agent/pore structure/micro-analysis分类
矿业与冶金引用本文复制引用
赵凯芳,王嘉峰,王录才,游晓红,黄闻战,米渊聪..熔体发泡法制备泡沫铝增黏过程优化及机理研究[J].铸造,2025,74(6):767-775,9.基金项目
吕梁市引进高层次科技人才专业科技创新平台建设项目(2023RC02). （2023RC02）
