Noticias

In traditional engineering materials, holes (macroscopical or microcosmic) are considered as structural defects, because they are often the core of crack formation and propagation, which have adverse effects on the physical and mechanical properties of materials. However, when the number of holes (that is, the porosity rate) in the material increases to a certain degree, the material will develop some strange functions due to the existence of holes, thus forming a new material category. This is the so-called porous material, which can also be called aluminum foam material .

 
Porous materials have great potential for light structure, energy absorption and thermal management due to their low density, unique surface and volume effects, and excellent mechanical, electrical, thermal and acoustic properties.The combination of these properties allows it to be used far beyond a single functional material.
It has broad application prospects in aerospace, chemical industry, building materials, metallurgy and other fields.Due to the complexity of the problem and the diversity of materials, it is also a frontier research field of multi-disciplinary intersections, which attracts the attention of the theoretical and engineering .According to the different pore structure, metallic aluminum foam material has two forms of opening and closing holes. Among them, holes of aluminum foam are connected by hole edges, which are connected with each other and have good ventilation, so they have good heat transfer and heat dissipation ability, sound absorption ability, and filtration and separation ability .
In addition to the connection of pore edges, there are also pore walls between closed-hole aluminum foam holes and holes, and the holes are approximately spherical in shape, with high porosity and large specific surface area.These structural characteristics determine that closed-hole aluminum foam has excellent mechanical properties, energy absorption properties, sound absorption properties, sound insulation properties and electromagnetic shielding properties.