What is metal foam?

Metal foam is a foam filled with a gas bubble-made of metal, often aluminum. The metal foam is supplied in two varieties, foam with closed cells, closed pores and foam with open cells, open pores. Metal foams have a very high view where 75-95% of the material volume is empty, filled with air or hydrogen. Metal foams retain many characteristics of metal used to produce them, such as non -ray. On the other hand, metal foams are less conductive than solid metal and are considerably weaker, albeit rarely weaker than wood. Metal foams are easily recyclable back to the original metal, which makes them repeatedly than polymer foams.

Metal foam is sometimes considered to be a subgroup of cellular metal materials in general, which also includes “metal fungi”, although the term “metal foam” is often used interchangeably with all cellular metal materials. Several categories of cellular metal materials, including cellular metal (metal pInternal cells, usually closed), porous metal (with closed, smooth curved cavities (pores) rather than grazed or open cavities), metal foams (special cases of porous metals, formed by gas bubbly with liquid metal and then let it solidify) and metal spongs. essentially open. These categories do not exclude each other and there are some substances that spread more categories. For example, foam with broken cell walls can be on the edge of metal foam and metal mushrooms.

Many metal foams are formed by introducing air bubbles into the molten metal. Making molten metal foam is not easy and the material is therefore expensive. A foaming agent, such as the titanium hydride powder, spreads into titanium and hydrogen at high temperatures, must be used. Metal foam is a special material that is usedWish for aviation, heat exchangers and other high -performance applications. Because the metal foam is stiff and light, it has often been designed as a futuristic structural material, although it has not yet been used as one. Some commercial metal foams include M-Pores, Pravair, Duocel, Korea, metaphoam and Remat. Pores in metal foams usually have a diameter of 1-8 mm, but some special foams have pores so small that they are invisible to the eye.

Closed cell metal foams have been produced only since 1990. It is interesting that some metal foams are so scattered that they float on the water. Metal foams are sometimes offered as an ideal material for creating floating ocean platforms for solar panels or even cities.