Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Alantum Corporation

Alantum Europe Gmbh

Burghardt Klöden

Thomas Weissgärber

Gunnar Walther

Bernd Kieback

Tilo Büttner

Arne Boden

Hans-Dietrich Böhm

Alexander Böhm

Shadi Saberi

Jungsuk Bae

Rene Poss

Benjamin Graffel

Falk Winckler

Stefan Fröhlich

Dejan Radivojevic

Sven Fritzche

Winfried Dölling

Myungjoon Jang

James Choi

Hyuntae Kim

Juliane Böhm

Dirk Neumann

Sven Fritzsche

A method is provided for smoothing a surface region of a component consisting of an electrically conductive material. The surface region of the component is coated inside a vacuum chamber, by focused electron beam(s) with a first surface energy, which brings about melting of the component material within the surface region. Before melting, the surface region is passed over at least twice by the electron beam, each time with a different focal length of the electron beam. A second surface energy is set for the electron beam, such that no melting of the component material is brought about in the surface region. Data is recorded by a number of sensors arranged inside the vacuum chamber. An actual value for the roughness is compared to a set point value. If the actual value has not reached the set point value, a value for the first surface energy is determined via comparison.

Method for smoothing a component surface region

A metallic foam body containing an alloy skin which is up to 50 &#x3bc;m thick can be obtained by a process including (a) providing a metallic foam body comprising a first metallic material; (b) applying a second metallic material which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the foam body (a), by coating the metallic foam body with an organic binder and a powder of the second metallic material; (c) forming a skin on foam body (b) by alloying the first and the second metallic material; and (d) leaching out with a leaching agent at least a part of the first and/or the second metallic compound.

Surface modified metallic foam body, process for its production and use thereof

Disclosed are an open-porous metal foam and a method for manufacturing the same. An open-porous metal foam according to an exemplary embodiment of the present invention is made of an iron-based alloy including 15 wt % or more of chrome and 5 wt % or more of aluminum. The open-porous metal foam is a semi-product that is formed of iron or the iron-based alloy that does not include chrome and aluminum or includes a smaller amount of chrome and aluminum in the powder when manufacturing, and the surface and the open pore thereof are uniformly coated with the powder of the iron-chrome-aluminum alloy and the organic binding agent. When heat treatment is performed under a reduction atmosphere, sintering is performed. In this case, the metal foam body that is formed of the iron-chrome-aluminum alloy is obtained by compensating concentrations of alloy elements between the semi-product and the powder by diffusion, and a content of chrome and aluminum in the metal foam is smaller than a content of chrome and aluminum included in a starting alloy of the used powder.

Open-porous metal foam body and a method for fabricating the same

Growing community of inventors

Dresden, Germany

Burghardt Klöden