Preparation of Large Aperture and High Porosity Aluminum Foam
Author of the article:HUANG Bin
Author's Workplace：School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723003,China
Key Words：porosity large aperture aluminum foam pore structure
Abstract：
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.
