Foamed aluminum is made by adding additives to pure aluminum or aluminum alloy through a foaming process, and has both metal and bubble characteristics. It has low density, high shock absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and high forming accuracy , Surface coating can be carried out.
Foamed aluminum has excellent physical, chemical and mechanical properties, as well as recyclability. These excellent properties of foamed aluminum make it have broad application prospects in today's material field, and it is a promising engineering material, especially in the transportation industry, aerospace industry and building structure industry.
Why is the development of foam aluminum so fast? The reason is that foamed aluminum has many advantages, such as the density of 0.1-0.4 times that of metallic aluminum; its flexural specific stiffness is 1.5 times that of steel; and its damping performance is 5-10 times that of metallic aluminum. When the aluminum foam with a porosity of 84% undergoes a 50% deformation, it can absorb more than 2.5MJ/m3 of energy. When the sound wave frequency is between 800-4000HZ, the sound insulation coefficient of the closed-cell aluminum foam is above 0.9. When the electromagnetic wave frequency is between 2.6-18GHZ, the electromagnetic shielding capacity of foamed aluminum can reach 60-90dB.
Structure: Foamed aluminum is easy to cut, drill, and glue; it can be bent into a desired shape by molding; it can be surface treated with organic or inorganic paint; it can be skinned on both sides to form a large-size lightweight, high-rigidity board. Foamed aluminum materials can be installed in high places without mechanical lifting equipment, such as ceilings, walls and roofs, etc., can be connected and fixed by mechanical methods or directly with screws, or they can be pasted on the wall or ceiling with adhesives . The "sandwich" structure formed by thin metal plates-aluminum foam-metal thin plates inherits the excellent performance of aluminum foam and has high bending strength. It can be used as new building materials, high-rigidity structural parts of rolling stock, etc.