ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Fabrication of Aluminum foam with near net shape has been investigated by powdermetallurgy method and conventional pouring method. PM method is good for fabrication of near netshape foam, but it needs high cost compared with pouring method. More cost-effective methods areneeded to make near net shape al foam to be applied various field. Therefore, novel method forfabrication Al foam was researched in this paper. In order to prepare near shape Al foams withhomogeneous pore structures, the so-called upward foaming method was designed and applied. Byusing this method, two kinds of molds were designed, one is stainless mold used for melting andfoaming Al and another is the plaster mold with near net shape. The fabrication procedures of near netshape Al foam are as following: (1) a quantity of Al ingot was melted in the stainless mold; (2) Caparticles was added in the Al melt to increase its viscosity; (3) TiH2 was introduced in the thickenedAl melt to make melt being foamed; (4) the plaster mold was put on the stainless steel one to makeenlarging Al melt foam fill with the plaster one; (4) the plaster mold was removed and was cooled.In this study, in order to get near net Al foam with relative good pore structures, the plaster moldswere designed with three different upside styles and their effects on the pore structures (pore size,porosity and cell wall thickness) of Al foams were investigated. The results showed that the Al foamhad the relative good pore structures when the plaster mold with a void was applied
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.269.pdf
