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大孔径高孔隙率泡沫铝的制备
Preparation of Large Aperture and High Porosity Aluminum Foam
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- DOI:
- 作者:
- 黄斌
HUANG Bin
- 作者单位:
- 陕西理工大学材料科学与工程学院
School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723003,China
- 关键词:
- 孔隙率 大孔径 泡沫铝 孔结构
porosity large aperture aluminum foam pore structure
- 摘要:
- 采用熔体发泡工艺,用纯铝作原料,氢化钛为发泡剂,金属钙粉为增粘剂,制备出孔结构均匀,孔隙率大于80%,孔径大于4.2mm的闭孔泡沫铝,整个工艺过程控制平稳。探讨了发泡温度、金属钙粉和氢化钛加入量及搅拌时间对泡沫铝结构的影响。结果表明,增粘剂钙粉的加入量为1.5%~2.0%,增粘温度850~860℃,搅拌时间为2.0~2.5 min,发泡剂TiH2的加入量为1.5%~2.0%,发泡温度为680~690℃,发泡搅拌速度和时间分别为860 rpm和2.0~2.5 min,保温时间4.5~6.0 min时为最佳工艺。The melt foaming process was adopted,pure aluminum was used as raw materials,titanium hydride was used as foaming agent,and metal calcium powder was used as tackifier,to prepare closed-cell foamed aluminum with uniform pore structure,porosity greater than 80%and pore diameter greater than 4.2 mm.and the whole process was controlled smoothly.The effect of foaming temperature,metal calcium powder and titanium hydride addition and stirring time on the structure of aluminum foam were discussed.The results show that the best process are the metal calcium powder is added in an amount of 1.5 to 2.0%,the viscosity increasing temperature is 850 to 860℃,the stirring time is 2 to 2.5 min,the amount of titanium hydride added is 1.5 to 2.0%,and the foaming temperature is 680 to 690℃,the foaming stirring speed and time are 860 rpm and 2 to 2.5 min,and the holding time is 4.5 to 6 min,respectively.