Explain the advantages and performance knowledge of foam aluminum!

2023-07-21

With the development of modern technology, the preparation technology of foam metal is increasingly improved, and the manufacturing cost is constantly reduced. The foam metal represented by foam aluminum is a new functional structural material that has developed rapidly in recent years. As a structural material, it has the characteristics of light weight and high specific strength. As a functional material, foam aluminum has the advantages of shock absorption, impact absorption, high temperature resistance, sound insulation, sound absorption, etc.

The pores in closed cell foam aluminum are filled with gases with very low heat transfer capacity, making its heat transfer capacity much smaller than that of solid materials. Through hole foam aluminum has large specific surface area, high porosity, wide heat diffusion space and high heat transfer of the hole wall, which endows it with good heat exchange performance. Under the condition of Natural convection, heat exchange can be carried out between the through hole foam aluminum and its hole wall through the flow of gas or liquid in the holes of foam metal such as through hole foam aluminum, so through hole aluminum is a good heat exchange material or heat dissipation material.

In the compression process, foam will convert a lot of work into energy in the form of deformation, collapse, fracture and mutual friction of foam cells, so foam can absorb a lot of external impact energy. Foam aluminum has high damping characteristics, and the damping value of pure aluminum foam is about 5-10 times that of aluminum. With the good energy absorption and damping properties of foam aluminum, it can be made into excellent energy absorption materials and shock absorption materials, such as automobile bumpers, spaceship landing gear, elevators, conveyor safety pads, and high-speed grinder protective cover energy absorption lining.

Due to its good fluid transmission power, the heat dissipation performance of through-hole foam metal can even reach the heat conduction performance of its compact matrix. The use of this foam metal can enhance the heat exchange capacity of equipment such as heat exchangers for aviation equipment, compact fins for energy power and condensing towers for air cooling. For example, for the deicing device and antifreeze device used on the aircraft, the through-hole foam aluminum plate is installed in front of the wing, and the purpose of deicing can be achieved by spraying heated gas or Antifreeze from the foam aluminum plate.