[China Aluminum Industry Network] Foam aluminum is a foam aluminum alloy material developed by experts of the Russian Light Alloy Research Institute. The strength of the material can be compared with that of beech wood and foam concrete, and its light weight can be compared with that of wood panels. . The foamed aluminum alloy material is obtained by mixing an oxidized aluminum alloy powder with a substance that is separated during heating and gasification. Due to different alloys contained in aluminum, different heating procedures, and different gasification powders obtained when new materials are synthesized, the later obtained foamed aluminum alloys have different densities, and the pores of the foams are also very small. Foam aluminum alloy material has a certain sound insulation and thermal insulation, non-toxic and will not burn. The material can be sawed and milled, and can be screwed onto it. This new material, which is light, strong and not afraid of fire, can be used for the veneering of elevator doors, the laying of trains and the ground of subway cars.
Aluminum foam has small density, high forming precision, easy processing, filtration capacity, high absorption shock resistance, high temperature resistance, strong fire resistance, corrosion resistance, noise reduction, low thermal conductivity, high electromagnetic shielding, and strong weather resistance. It is made by adding foaming process to additives in pure aluminum or alloys, and features both metal and foam.
Aluminum foam has excellent physical properties, chemical and mechanical properties and recyclability.
1. High specific stiffness: its bending rigidity is 1.5 times that of steel;
2, light: the density of metal aluminum 0.1-0.4 times;
3, good acoustic function;
4. Good thermal performance: The thermal conductivity of closed-cell aluminum foam with a porosity of 80-90% is 0.3-1 W/mk, which is equivalent to marble. Through-hole aluminum foam has good heat dissipation under forced convection conditions because its pores communicate with each other.
5, metal skeleton composition and pore structure control, can adapt to different needs.
6, metal sheet - foam aluminum - formed by the metal sheet "sandwich" structure inherits the excellent performance of foam aluminum, and has a high flexural strength, can be used as a new building materials, locomotives and vehicles with high rigidity structural parts.
7, larger aperture 0.3-7mm;
8. Diversification of pore structure; closed-cell, through-hole and micro-via aluminum foam;
9, a large surface area of ​​10 --- 45cm2/cm3;
10, easy to install: aluminum foam material can be installed in high places without mechanical lifting equipment, such as: ceilings, walls and roofs, etc., can be mechanically or directly screwed and fixed, adhesive can also be used to paste On the wall or ceiling.
11, easy processing: cutting, drilling, cementing convenient; can be bent into the desired shape after molding; can be surface treatment with organic or inorganic paint; can be two sides of the skin, constitute a large size of light, high stiffness plate. 12. Excellent electromagnetic shielding performance: When the electromagnetic wave frequency is between 2.6-18 GHz, the electromagnetic shielding capacity of aluminum foam can reach 60-90dB.
Because of the diversity of its functions, it determines the extensiveness of the application field. The appearance of foam aluminum has solved the technical problems in many fields. Therefore, the development prospect of aluminum foam is quite considerable.