The hottest new material at the moment - Metal Foam 
Metal foam has a certain degree of strength, ductility and additivity, and can be used as a lightweight structural material. The material has long been used as a core material for aircraft clamping components. In the aerospace and missile industries, foam metals are used as lightweight, heat-transferring support structures. Because it can be welded, glued or plated to the structure, it can be made into a sandwich load-bearing components. Such as for the wing metal shell of the support body, the missile nose cone of the shell of the anti-temperature collapse of the support body (because of its good thermal conductivity) and the landing gear of the spacecraft and so on. In construction, metal foam is needed to make light, hard, fire-resistant elements, railings or the support body of these things. The high-frequency, high-speed acceleration and deceleration of modern elevators also requires lightweight structures with both energy-absorbing and load-bearing properties to reduce energy consumption. Cylindrical shells are widely used in engineering structures such as airplane fuselages and off-shore oil platforms. Thin-walled cylindrical shells are easily damaged when subjected to loads, but if the shell is supported by a continuous foam: coil, the structure has greater strength than an unreinforced center shell of the same diameter and size. Copper foam is easier to produce and easier to deform, making it suitable for use as a fastener. Foam metal can also be used as a reinforcing material for many organic, inorganic and metallic materials. Such as nickel foam filled with molten aluminum solidification made of nickel foam reinforced aluminum alloy (NFRA) materials.
Foam metal is very suitable for use as a variety of bearing panels, shells and tubes of lightweight j coil, made of a variety of laminated composite materials. A typical example of the use of porous materials for structural components is the production of sandwich panels. The sandwich panels used in modern aircraft use a glass or carbon fiber composite skin. The skins are separated by metallic aluminum or paper-resin honeycomb materials, or by rigid polymer foams, in order to give the sandwich panel a high specific bending stiffness and specific bending strength. The same technology has been extended to a number of other applications where weight is a key metric: space shuttles, bobsleds, racing boats, and moveable buildings, among others.

Cushioning protection is also one of the main uses of foam metals, which must have the ability to absorb energy while keeping the maximum force acting on the protected object below the limit of causing damage. Porous foam materials can be well suited for such applications. By controlling its relative density, the strength of the foam metal can be adjusted over a wide range. In addition, the material can withstand large compressive strains under almost constant stress, so that a large amount of energy is absorbed without high stresses. In the preparation of artificial bone, according to the requirements of pore size of 150¨m ~ 250¨m and large porosity, inorganic materials due to the strength of this time can not meet the requirements of use, and gradually developed into the metal foam artificial bone. These foam metals are produced by conventional methods such as electroplating, and they are subjected to loads during molding and other processes as well as in the human body. It is extremely important for most human bone materials that do not have a self-recovery effect to realize the large porosity required for human bone while maintaining high mechanical properties, i.e., to meet the large porosity required for human bone while maintaining high mechanical properties.