The production of foamed aluminum has long been considered difficult to realized because of such problems as the low foamability of molten metal, the varying size of cellular structures, solidification shrinkage nad so on. Recently these problems have been solved by a number of researches and some manufacturers produce foamed aluminum by their own methods. We have been employing a batch casting process and manufacturing foamed aluminum under the tradename ALPORAS~direct R since 1986. This paper presents the manufacturing process, physical properties and some typical applications of ALPORAS.
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