	US 12,303,981 B2
	Method for producing an open-pored molded body which is has a modified surface and which is made of a metal
Tilo Buettner, Dresden (DE); Gunnar Walther, Dresden (DE); Hans-Dietrich Boehm, Dresden (DE); Thomas Weissgaerber, Dresden (DE); Bernd Kieback, Possendorf (DE); Christian Immanuel Mueller, Dresden (DE); Robin Kolvenbach, Munich (DE); and Lars Torkuhl, Munich (DE)
Assigned to ALANTUM EUROPE GMBH, Munich (DE); and FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG B.V., Munich (DE)
Appl. No. 16/648,062
Filed by Alantum Europe GmbH, Munich (DE); and Fraunhofer-Gesellschaft zur Foerderung Der Angewandten Forschung e.V., Munich (DE)
PCT Filed Sep. 14, 2018, PCT No. PCT/EP2018/074883 § 371(c)(1), (2) Date Mar. 17, 2020, PCT Pub. No. WO2019/057625, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 10 2017 216 566.9 (DE), filed on Sep. 19, 2017.
Prior Publication US 2020/0276644 A1, Sep. 3, 2020
Int. Cl. B22F 7/00 (2006.01); C22C 1/08 (2006.01); C25D 5/56 (2006.01)

CPC B22F 7/002 (2013.01) [C22C 1/08 (2013.01); B22F 2301/052 (2013.01); B22F 2301/10 (2013.01); B22F 2301/30 (2013.01); C25D 5/56 (2013.01)]

9 Claims

1. A process for producing open-pored molded bodies having a modified surface comprising metal, sequential steps of coating on a surface with particles on an open-pored shaped body comprising a semifinished metal part with the particles of a chemical compound of a metal having a dentritic shape which is reduced or thermally or chemically decomposed in a thermal treatment to form metal particles of a size between 0.1 μm to 250 μm of the respective metal obtained by chemical reduction or thermal or chemical decomposition;

and then the coating on the surface with the metal particles is followed by at least one thermal treatment in which the metal particles of the respective metal are sintered and solely joined by sinter bridges to the surface of the semifinished metal part or adjacent the metal particles of the respective metal so that

a specific surface area of the open-pored shaped body, having a pore size of not more than 10,000 times the metal particle size, obtained is increased to at least 30 m²/l or by at least a factor of 5 compared to an uncoated semifinished metal part.