Although the research history of foamed metal materials has been more than 70 years, it has not been developed rapidly due to the difficulty of controlling the foaming process and pore size.

At present, the foam metals that people have prepared mainly include foamed aluminum, foamed magnesium, foamed copper, foamed nickel, foamed steel, foamed titanium, etc. Among them, foamed titanium has excellent physical and chemical properties of metal titanium and the special structure of porous materials. Biomedical materials, impact-resistant materials and battery materials have broad application prospects.
Application of titanium foam
1. Biomedical materials
Titanium foam has excellent biocompatibility, mechanical properties and corrosion resistance of titanium and its alloys, and is very suitable for use as biomedical materials.
Foamed titanium is rich in pores. Through these interconnected pores, it can provide sufficient water and nutrients for the growth of new bone tissue, which is conducive to the adhesion, differentiation and growth of bone cells, and strengthens the connection between the implant and the bone. Biological fixation.
Therefore, foamed titanium alloy as a human implant material can be widely used in the repair of bone iliac, joints, blood vessels and teeth.
2. Impact resistant materials
When foamed titanium is impacted, its pores can not only absorb more energy, but also can withstand higher failure stress. It is a material with excellent impact resistance.
Utilizing its excellent impact resistance, titanium foam can be used as a bumper for automobiles, landing gear for spacecraft, safety mats for elevator transmission, various packaging boxes, and protective materials for rockets and jet engines.
3. Battery materials
Using foamed titanium material with high porosity and large specific surface area [ii] as the gas diffusion layer material of the fuel cell can greatly increase the energy release during the electrochemical reaction.
4. High temperature dust filter material
Due to the permeability of the void structure, the foamed titanium integrates high temperature heat resistance, oxidation resistance and permeability, and can be used for dust filtration under high temperature conditions.
In recent years, the research of foamed titanium materials has achieved certain results, but the technology is still immature, and it is still far from the industrialization stage. To make titanium foam more widely used, more in-depth research is still needed.