Uses of spherical porous aluminum Spherical porous aluminum is a metal material containing a certain amount, a certain size of pore size and a certain porosity in the aluminum matrix. It is a new type of environmentally friendly structural functional material that integrates a variety of excellent properties. Involving aerospace, ordnance equipment, machine manufacturing, ships and land vehicles, construction and other industries, the demand for spherical porous aluminum materials is mainly concentrated in sound absorption and noise reduction, energy absorption and buffering, vibration reduction, explosion-proof, heat dissipation, filtration, wave absorption, Electromagnetic shielding and other applications.
Application of spherical porous aluminum in aerospace
1. Making heavy equipment airborne cushions
The steel plate paper honeycomb airborne cushion developed in my country’s “Twelfth Five-Year Plan” has a high density and a small energy absorption buffer capacity. The energy absorption is about 500KJ/m3, and it is only suitable for airborne equipment of about 10 tons. With the installation of 20 large aircraft, it is necessary to provide cushions for airborne heavy equipment of about 20 tons. The airborne cushions for heavy equipment made of spherical foam aluminum are shown in Figure 1, which can be used to airborne armored vehicles, tanks, etc. Amphibious combat vehicles, etc.; when airborne equipment of 20 tons, the theoretical thickness of the buffer platform is 250mm, and the actual thickness is selected as 500-800mm, and the landing is stable; it can realize manned airborne, which can not only ensure the life safety of soldiers, but also immediately after landing. Enter the battle and increase the combat effectiveness of your airborne troops.
2. Making land-based missile launch manhole covers
Land-based missile silo covers are made of carbon steel or alloy steel skeleton, reinforced concrete and other materials (Figure 2). The large manhole cover is about 22 meters long, about 9 meters wide, 1.5 meters thick, and weighs more than 600 tons. The manhole cover is too bulky, which is not conducive to the quick response of opening and closing. The large manhole cover using the composite structure of steel plate and spherical aluminum foam is shown in Figure 3. The upper surface is 20mm thick steel plate, the middle spherical aluminum foam thickness is 600mm; the bottom layer is PE fiberboard 20mm, and the bottom layer steel plate is 10mm thick. The weight is 90 tons, and the anti-knock is increased by more than 1000 times. The GBU-28 semi-armor-piercing projectile with a diameter of 370mm and a high-explosive charge of 306 kg was used to simulate. Due to the compression buffering effect of the 600mm-thick spherical foam aluminum, the area of the armor-piercing projectile on the 20mm-thick armored steel plate was expanded to more than 200 times. Therefore, the role of the armor-piercing projectile The force is reduced to less than one hundred percent, making it difficult to penetrate.
3. Making spherical foam aluminum explosion-proof door
The currently used reinforced concrete explosion-proof door (Figure 4) has a total thickness of 300-400mm, a weight of 20-30 tons, and an anti-explosion capacity of 3Mpa. Since it is too heavy, it is difficult to open and close. The explosion-proof door is made of carbon steel plate/sphere foam aluminum composite structure (Figure 5). The carbon steel panel is 5mm thick, and the middle sandwich is 100mm thick spherical foam aluminum. The spherical foam aluminum plate and the steel plate are pasted with silicone structural adhesive, and then reinforced with countersunk bolts. The anti-knock ability is more than 1000Mpa, which is increased by 300 times. The compressive strength is equivalent to the strength of a solid steel plate with a thickness of 110mm; the mass is 1/12 of that of a reinforced concrete explosion-proof door. switch.
