About types of metal foam

Currently, metals foam are prepared by sintering, electroplating, pressure casting, and foaming methods. Among them, the electroplating method and the powder metallurgy method under the subdivision of the foaming method are common. The former by adding foaming agent to the molten metal to produce metal foam; the latter through the electrodeposition process in the polyurethane foam skeleton copied into metal foam. At present, the metal foam has been widely used in aluminum nickel, copper and its alloys, in addition to iron, magnesium, titanium, steel, lead and so on also have a certain application space, we hereby briefly introduce the first three.

Aluminum foam and its alloys: lighter in mass, with heat insulation, sound insulation, electromagnetic shielding, absorption of impact energy and other characteristics, in the missile. Flying machine and its recycling parts of the impact protection layer has been used. In addition, in the automobile buffer, electronic and mechanical vibration damping devices, pulse power electromagnetic wave shielding cover and other fields we can also see its figure.

Nickel Foam: With its connected pore structure and high porosity, it performs well in terms of high gas permeability, high specific surface area and capillary force. It is commonly used to make fluid filters, catalytic converters, atomizers, as well as battery electrode plates and heat exchangers.

Copper foam: has good electrical conductivity and ductility, compared with nickel foam, the preparation cost is lower, better electrical conductivity in the preparation of the battery negative electrode (carrier) materials, catalyst carriers and electromagnetic shielding materials and other aspects of great potential. But copper foam due to its
But copper foam due to its corrosion resistance is not as good as nickel, and therefore limit its application space. Metal foam as a new material, its cost, practicality and other aspects have a very good performance, in the current development of science and technology, the innovative preparation and application of metal foam to expand the field are very active, the future development is worth looking forward to.