Open-cell Metal Foams

© Fraunhofer IFAM Dresden

Wirbelkörper

© Fraunhofer IFAM Dresden

Schaum, fein

© Fraunhofer IFAM Dresden

Schaum

The development of open-cellular metal foams is done in a co-operation via the bundling of the expertise of the Fraunhofer institutes IKTS and IFAM. In a powder metallurgy molding process first a PU sponge is coated in a suspension. The substrate then is removed again by a thermal treatment and the remaining structure is finally sintered.

The cell-width of the foams can be adjusted by the choice of suitable starting materials from 0,3 to 5 mm, the relative density is adjustable in a range between 9 and 30%. Due to this high variability of the structure the functional characteristics are purposefully adjustable such as firmness, sound absorption, flowing through barness and heat transfer. A further substantial advantage of the procedure is in the particularly good homogeneity of the structure, remaining the same characteristics within wide ranges guaranteed.

Properties

© Fraunhofer IFAM Dresden

MO OZS

© Fraunhofer IFAM Dresden

REM

Open-cell metal foams possess a very homogenous structure, which guarantees constant characteristics in wide-ranging areas. Open-cell metal foams can be produced in a large spectrum of pore sizes and densities. The adjustable pore sizes range from 0.3 to 5 mm, the relative density can be between 5 and 30 %. Bcuase of the structure's high variability, the functional properties like mechanical strength, sound absorption, flow and heat transfer can be precisely adjusted.

Materials

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Comparison of strength of different materials


Steels


Titanium, α-β-Titanium alloys, Tantalum


Molybdenum, Nickel Basis, intermetallic compounds


Copper, Copper alloys