This paper briefly presents characteristics, application and development of the metal-lic foams. Sound specimen has been achieved with preparing foam aluminum by usinginvestment casting process. The preparation of plaster prefabricated mould is one keyin investment casting. Main composition, ingredient and affecting factors of plas-ter mould are also discussed and the vacuum-infiltrated shaping technique was foundto be another important link. The penetrating model and the affecting mechanismof the main parameters were also analyzed. As a result, the optimum values weredetermined.``
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