泡沫铝夹心板芯层泡沫结构的研究  

Study on the foaming structure of sandwich layer of aluminum foam sandwich

作　　者：祖国胤[1] 张敏[1] 姚广春[1] 李红斌[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《功能材料》2007年第5期859-861,共3页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(200433G060);辽宁省博士启动基金资助项目(20061017)

摘　　要：研究了采用轧制复合-粉末冶金发泡法制备的泡沫铝夹心板的生产工艺,探讨了主要工艺条件对芯层泡沫结构的影响,得到了优化的工艺参数。研究结果表明：轧制复合工艺可以使芯层粉末达到很高的致密度,为发泡过程创造了有利条件。轧制复合板适宜的发泡温度为615-620℃,温度过高会导致芯层出现大尺寸连通孔。发泡时间对熔融态泡沫体的凝固过程有显著影响,时间过长会使泡沫层塌陷,发泡温度为620℃时,经4-6min发泡芯层可形成良好的泡沫结构。Author studied the production technology of aluminum foam sandwich prepared by roll-bonding/powder metallurgy foaming process in this paper,and analyzed the effect of main technological conditions on foaming structure of sandwich layer,and optimum technological parameters were finally obtained. The results show that the roll-bonding technology can make the core powder tighter and can get the beneficial conditions for forming. The best foaming temperature was 615 to 620℃ ,and oversize connected pores occurred when foaming temperature was too high. Foaming time had also obvious effect on the solidification process of foaming body, and the foaming layer sank when time was too long. The excellent foaming structure was got when foaming temperature is 620℃ and foaming time is 4 to 6min.

关 键 词：泡沫铝夹心板 轧制复合 粉末冶金发泡 致密度 发泡温度 发泡时间 

分 类 号：TG146.2[一般工业技术—材料科学与工程]