Brief description of the preparation and application of magnesium foam

Magnesium foam is a composite material composed of a Metallic phase and pores, possessing both the metallic characteristics of continuous magnesium and the features of dispersed pores.

Currently, the main preparation methods for magnesium foam include infiltration casting, lost mold casting, powder metallurgy, vacuum suction casting, melt foaming, negative pressure infiltration, directional solidification, vacuum foaming, thixomolding, and pulse current sintering.

Magnesium foam materials have very broad application prospects in the aviation industry. They can be used for filling civil aircraft wings, as sound insulation material between engines and cabins, as passenger aircraft shell material, thermal insulation material, vibration damping material, impact energy absorption material, electromagnetic shielding material, and more.

As a porous metal, the uNique structural characteristics of magnesium foam give it incomparable advantages over solid metals as both a structural and functional material. The special properties of magnesium foam are mainly reflected in its sound absorption performance, damping performance, energy absorption performance, blast impact resistance, biomimetic properties, and electromagnetic shielding performance. These special properties make magnesium foam valuable in various fields.

Utilizing its sound absorption performance, magnesium foam can be made into sound-absorbing materials such as sound-absorbing panels in tunnels and soundproof walls in factories. It can also be made into torpedo sound insulation panels for application in the national defense sector.

In the military field, magnesium foam can be used to manufacture tank gearboxes, transmission cases, and casings for jet control panels. In the mechanical industry, it can be used as machine tool bearing components to reduce instrument vibration noise, improve service life, and enhance the precision of instruments and meters.

Magnesium foam exhibits good biocompatibility, mechanical compatibility, and biodegradability, and has a porous structure conducive to cell growth. Therefore, magnesium foam can be used as an ideal biomimetic material to replace human bones. Currently, the bottleneck for its use as a biomimetic material is how to solve the problem of its poor corrosion resistance in human tissues. The commonly adopted method is to modify its surface to make it an effective biomimetic material that can be implanted into the human body.

The energy absorption and impact resistance of magnesium foam allow it to be developed into effective shock-proof materials, applied as packaging shells for precision instruments. It can also be used to manufacture buffers for car body shells. Magnesium foam has strong absorption and reflection capabilities for electromagnetic waves, and its electromagnetic shielding performance is good. Therefore, it can be used to make casings for precision electronic instruments.