MANUFACTURING METHOD OF METAL FOAM AND METAL FOAM MANUFACTURED THEREBY

• Main Authors: KIM, DONG SEOK, KIM, DO KYUNG, CHO, YONG HUN, CHOE, HEE MAN, JO, HYUN GYUNG, CHOI, HYE LIM, CHOI, MYOUNG GEUN
• Format: Patent
• Language: English; Korean
• Published: 09.07.2014
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to a manufacturing method for a metal foam and, more specifically, a manufacturing method for a metal foam, which comprises: (a) a step of mixing two or more kinds of metal powders; (b) a step of forming the mixed powder obtained in step (a); (c) a step of sintering the formed body obtained in step (b); (d) a step of sintering the sintered body obtained in step (c) for the second time; and (e) a step for manufacturing the metal foam by dealloying the sintered body sintered in step (d). According to the present invention, the manufacturing method of the metal foam is capable of manufacturing the metal foam more simply than a conventional method at much lower temperatures than those of the conventional method by using a heat treatment process after dealloying the metal alloy manufactured by a sintering process, wherein the metal foam is usefully used and applied to a substrate for a heat exchanger, a catalyst, a sensor, an actuator, a gas diffusion layer (GDL), a fuel cell, a microfluidic flow controller, etc., since the metal foam manufactured by the method has a high specific surface area formed by a microstructure mixed with nanosize and microsize gas pockets, and shows excellent properties for supplying a fluid such as liquid and gas and for transporting electrons.