Closed-cell aluminum foam has excellent characteristics

such as light weight

high specific strength

high specific stiffness

flame retardancy

energy absorption and vibration damping

sound insulation

which has a broad prospect in transportation

aerospace

architecture and other fields. Melt foaming method is widely used in industry for preparing closed-cell aluminum foam. Nevertheless

there still exists problems including poor bubble stability in the foaming stage and high cost in closed-cell aluminum foam fabricated by melt foaming method. On this basis

main process factors affecting pore structure of closed-cell aluminum foam were discussed. The characteristics of common thickening and foaming agents were summarized. The influence law of thickening

foaming and freezing process parameters on porosity and pore diameter of closed-cell aluminum foam were analyzed. Finally

the process of preparing closed-cell aluminum foam by melt foaming method was prospected.