Method For Manufacturing Metal Foam

Patent metadata

Field	Value
Publication number	US-2020122232-A1
Application number	US-201716089864-A
Country	US
Kind code	A1
Filing date	Apr 3, 2017
Priority date	Apr 1, 2016
Publication date	Apr 23, 2020
Grant date	—

Abstract

The present application provides a method for manufacturing a metal foam. The present application can provide a method for manufacturing a metal foam, which is capable of forming a metal foam comprising uniformly formed pores and having excellent mechanical properties as well as the desired porosity, and a metal foam having the above characteristics. In addition, the present application can provide a method capable of forming a metal foam in which the above-mentioned physical properties are ensured, while being in the form of a thin film or sheet, within a fast process time, and such a metal foam.

First claim

1 . A method for manufacturing a metal foam comprising a step of sintering a green structure comprising a metal component, which comprises a conductive metal having a relative magnetic permeability of 90 or more, and a salt.

2 . The method for manufacturing a metal foam according to claim 1 , wherein the conductive metal has a conductivity at 20° C. of 8 MS/m or more.

3 . The method for manufacturing a metal foam according to claim 1 , wherein the conductive metal is nickel, iron or cobalt.

4 . The method for manufacturing a metal foam according to claim 1 , wherein the green structure comprises, on the basis of weight, 30% by weight or more of the conductive metal.

5 . The method for manufacturing a metal foam according to claim 1 , wherein the conductive metal has an average particle diameter in a range of 10 μm to 100 μm.

6 . The method for manufacturing a metal foam according to claim 1 , wherein the salt is NaCl, KCl, K 2 CO 3 , KOH, NaOH, CsCl, CaCl 2 , MgBr 2 , MgCl 2 , Na 2 SiO 3 , Na 2 CO 3 , NaHCO 3 , NH 4 Br or NH 4 Cl.

7 . The method for manufacturing a metal foam according to claim 1 , wherein the salt has a particle diameter in a range of 30 μm to 250 μm.

8 . The method for manufacturing a metal foam according to claim 1 , wherein the green structure comprises 10 to 1,000 parts by weight of the salt, relative to 100 parts by weight of the metal component.

9 . The method for manufacturing a metal foam according to claim 1 , wherein the green structure is in a film or sheet shape.

10 . The method for manufacturing a metal foam according to claim 9 , wherein the film or sheet has a thickness of 5,000 μm or less.

11 . The method for manufacturing a metal foam according to claim 1 , wherein the sintering of the green structure is performed by applying an electromagnetic field to said structure.

12 . The method for manufacturing a metal foam according to claim 11 , wherein the electromagnetic field is formed by applying a current in a range of 100 A to 1,000 A.

13 . The method for manufacturing a metal foam according to claim 11 , wherein the electromagnetic field is formed by applying a current at a frequency in a range of 100 kHz to 1,000 kHz.

14 . The method for manufacturing a metal foam according to claim 11 , wherein the electromagnetic field is applied for a time in a range of 1 minute to 10 hours.

15 . The method for manufacturing a metal foam according to claim 1 , further performing a step of removing the salt after sintering.

Assignees

• Lg Chemical Ltd

Inventors

• Yoo Dong Woo
• Lee Jin Kyu

Classifications

• B22F3/1134 Primary

  Inorganic fillers (carbonaceous or paper filler B22F3/1121) · CPC title

• B22F3/1103

  with particular physical characteristics · CPC title

• B22F2301/15

  Nickel or cobalt · CPC title

• B22F2304/10

  Micron size particles, i.e. above 1 micrometer up to 500 micrometer · CPC title

• B22F2003/1053

  by induction · CPC title