Since the middle of the 20th century, countries all over the world have been competing in the research and development of porous foam metal. At the same time, they have also proposed a variety of different preparation processes. According to different applications and different structural requirements, the preparation processes used are also different.
Since aluminum foam material reflects the new trend of multi-disciplinary interpenetration of structural materials and functional materials, it shows a wide space in the academic field and has broad application prospects in the high-tech field and general industrial field. Cutting-edge hot materials for competition research in Japan, Germany and China. So far, the foam aluminum industry has been studied for nearly 70 years. Through these decades of research, how is the global foam aluminum industry developing? China's research on aluminum foam started late, has it taken over later?
Aluminum foam refers to the foaming process after adding additives to pure aluminum or aluminum alloy, and has both metal and bubble characteristics. It is a new type of functional material that integrates structure and performance.
Foam aluminum performance
1.Ultralight
The density is 0.2~0.4g/cm3, which is about 1/10 of aluminum density, 1/20 of titanium density, 1/30 of steel density, 1/30 of steel density, and 1/3 of wood density.
2.Sound absorption
Aluminum foam can absorb the energy of the sound through the vibration of the pore wall, which is used to muffle the sound. Remove noise.
3.Heat resistance
It has high heat resistance. Generally, the dissolution temperature of aluminum alloy is about 560·700℃. Single foam aluminum will not dissolve even if it is heated to 1400℃, and it will not release harmful gas at high temperature.
4.Electromagnetic wave shielding
Aluminum foam has good shielding of high-frequency electromagnetic waves, which can reduce electromagnetic interference by more than 80%.
Aluminum foam products
Foam aluminum preparation method
There are many methods for preparing aluminum foam, the specific classification is shown in the figure. Among them, for closed-cell foam aluminum, the main preparation methods are melt foaming and powder metallurgy. The preparation methods of through-hole foam aluminum mainly include infiltration casting method and investment casting method.
Daisy@foam-material.com