用二次发泡法制备SiC/Al复合泡沫铝孔结构的稳定性  

Stability of Pore Structure of ZL102 Al-alloy Foam Prepared by Secondary Foaming Method

作　　者：黄闻战 陈尧 陈鹏 张玉洁 陈星宇 HUANG Wenzhan;CHEN Yao;CHEN Peng;ZHANG Yujie;CHEN Xingyu(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《材料研究学报》2024年第8期605-613,共9页Chinese Journal of Materials Research

基　　金：太原科技大学博士科研启动资金(20192066);来晋优秀博士基金(20202021);山西省高等学校科技创新(2020L0342)。

摘　　要：用二次发泡法制备不同SiC含量的SiC/Al复合泡沫铝前驱体,再将其在660℃~700℃发泡制备出SiC/Al复合泡沫铝,用EDS、SEM和超景深显微镜等手段对其表征,研究了SiC含量对前驱体致密度的影响、对在不同温度制备的ZL102复合泡沫铝合金的孔隙率、孔数、平均孔径和孔壁厚度的变化,以及黏度对其孔结构稳定性的影响及其机制。结果表明,提高SiC含量可提高前驱体的致密度。680℃是较为适宜的二次发泡温度。随着发泡温度的提高低黏度泡沫铝的平均孔径和孔壁厚度减小,而高黏度泡沫铝的平均孔径增大、孔壁厚度减小。高黏度泡沫铝的孔结构稳定,其孔隙率更高。SiC/ZL102 Al-alloy composite foam was prepared via secondary foaming process in the temperature range of 660oC~700oC,by taking the prepared SiC/ZL102 Al-alloy composites with addition of appropriate foaming agent and various SiC amount as precursors.The influence of viscosity of melt composites on the stability of ZL102 Al-alloy foam was studied by revealing the relation between the SiC content with the density of precursor,the variation of porosity,pore number,average pore size and pore wall thickness of the prepared ZL102 Al-alloy foams at different temperatures.The acquired foams were characterized by means of EDS,SEM and super deep field microscope.The results show that with the increasing SiC content the density of the precursors is increased,whilst,the density,precursor with 6wt.%SiC is the highest.The suitable secondary foaming temperature is 680oC.With the increasing foaming temperature,the average pore size and pore wall thickness of low viscosity Al-alloy foam decrease,while the average pore size of high viscosity Al-alloy foam increases and the pore wall thickness decreases.The high viscosity Al-alloy foam has stable pore structure and higher porosity.

关 键 词：复合材料 金属基 泡沫铝 二次发泡 熔体黏度 SiC含量 

分 类 号：TB331[一般工业技术—材料科学与工程]