The influences of calcia silica contents to the compressive strength of the Al-7000 aluminium foam
Sutarnoa, Soepriyanto S.a, Korda A.A.a, Dirgantara T.a
a Department of Metallurgical Engineering, Faculty of Mining and Petroleum, Bandung Institute of Technology, Bandung, 40132, Indonesia
Abstract
This experiment evaluated the effect of calcia alumina and alumina silica that formed as side products involved in metal mixture of aluminium foam. These compounds are formed from additional calcium carbonate and silica in the mixture. Calcium carbonate (CaCO3) roles as a blowing agent source of carbon dioxide (CO2). The formation of calcia alumina (CaO.Al2O3) is desired to improve the viscosity and to strengthen of cell wall of aluminium foam. However, Al-7000 aluminium foam showed a decrease tendency of compressive strength probably due to existence of alumina silica (3Al2O3.SiO2) in the metal mixture. In this case, the silica that thermally combines with alumina compound may degrade the metal mixture of aluminium foam structure.
Author keywords
Alumina-silica,Aluminium foam,Cell walls,Metal mixtures,Side products,Silica content