Aluminum foam has the advantages of small density, high precision, easy processing, high filtration, high absorption, impact resistance, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding and weather resistance. It is made by adding additives into pure aluminum or alloy, and after foaming process, it has the characteristics of metal and foam.
Aluminum foam is a foam aluminum alloy material developed by experts from Russia Light Alloy Research Institute. The material's firmness can be compared with that of oak and foam concrete, and its light weight can be compared with that of wood plate. Foamed aluminum alloy is obtained by mixing oxidized aluminum alloy powder with a substance separated from heating and gasification process. Due to the different alloys contained in aluminum, the different heating procedures and the different gasification powders obtained during the synthesis of new materials, the final foam aluminum alloys have different densities and the pores of the foams are also large and small. Foam aluminum alloy has certain sound insulation and heat insulation, non-toxic and will not burn. The material can be sawn, milled and screwed up. This new light, strong and fire-proof material can be used for elevator door veneer, train and subway car floor laying.
Aluminum foam has excellent physical, chemical and mechanical properties as well as recyclability.
1. High specific stiffness: its bending stiffness is 1.5 times that of steel.
2. Light weight: density is 0.1-0.4 times that of metal aluminium.
3. Good acoustic function;
4. Good thermal properties: the thermal conductivity of closed cell aluminum foam with porosity of 80---90% is 0.3 - 1W/m#8226; K, equivalent to marble. The porous aluminum foam has good heat dissipation under forced convection conditions due to its interconnected pores.
5. The metal skeleton composition and pore structure are controllable and can meet different needs.
6, the "sandwich" structure formed by metal sheet - aluminum foam - metal sheet inherits the excellent properties of aluminum foam, and has high bending strength. It can be used as new structural material, high rigidity structural parts of rolling stock and so on.
7. Large aperture 0.3-7 mm;
8. Pore structure diversification; closed cell, through hole and micro hole foam aluminum;
9. The specific surface area is 10-45 cm 2/cm 3.
10, easy to install: foam aluminum can be installed at high places without mechanical lifting equipment, such as ceiling, walls and roofs, etc., can be mechanically or directly connected and fixed with screws, or can be pasted on walls or ceilings with adhesives.
11. Easy to process: easy to cut, drill and cementing; bendable to the desired shape by moulding; surface treatment with organic or inorganic paint; two-sided skin, forming a large-scale light, high-rigidity board. 12, excellent electromagnetic shielding performance: when the electromagnetic wave frequency is between 2.6 and 18GHZ, the electromagnetic shielding capacity of aluminum foam can reach 60 to 90dB.
Because of the diversity of its functions, the wide application field has been determined. The emergence of aluminum foam has solved many technical problems in many fields, so the development prospect of aluminum foam is considerable.
