KR-20260066216-A - METHOD FOR MANUFACTURING POROUS METAL MATERIAL AND A POROUS METAL MATERIAL MANUFACTURED BY THE METHOD

Abstract

The present invention relates to a method for manufacturing a porous metal material and a porous metal material manufactured by the method, comprising a slurry manufacturing step of manufacturing a slurry for a porous metal material by mixing a metal component, a solvent, a binder, and a co-solvent, and a sintering step of sintering the slurry manufactured in the slurry manufacturing step, thereby improving the uniformity of mixing within the slurry with the co-solvent so that pores are formed evenly throughout and thickness variation is minimized, which can significantly reduce the defect rate during manufacturing and improve the quality of the porous metal material.

Inventors

• 신종민
• 유동우
• 배충만
• 김연신
• 임민택

Assignees

• 주식회사 한화

Dates

Publication Date

20260512

Application Date

20241104

Claims (11)

1. A method for manufacturing a porous metal material, characterized by comprising a slurry manufacturing step of manufacturing a slurry for a porous metal material by mixing a metal component, a solvent, a binder, and a co-solvent, and a sintering step of sintering the slurry manufactured in the slurry manufacturing step.
2. In paragraph 1, The above slurry manufacturing step is, A method for manufacturing a porous metal material, characterized by comprising 20% to 90% by weight of a metal component, 5% to 70% by weight of a solvent, 3% to 15% by weight of a binder, and 1% to 10% by weight of a co-solvent in 100% by weight of a slurry for a porous metal material.
3. In paragraph 1, A method for manufacturing a porous metal material characterized in that the above-mentioned co-solvent is an alkylamine.
4. In paragraph 1, A method for manufacturing a porous metal material characterized in that the above-mentioned solvent is propyl amine or n-butyl amine.
5. In paragraph 1, A method for manufacturing a high-purity porous metal material characterized by manufacturing a porous metal material with a thickness variation of 5% or less.
6. In paragraph 1, A method for manufacturing a high-purity porous metal material characterized by manufacturing a porous metal material having a surface residual carbon concentration of 2.5 (At%) or less.
7. A high-purity porous metal material characterized by being manufactured by a method for manufacturing a high-purity porous metal material according to any one of claims 1 to 6.
8. In Paragraph 7, A porous metal material characterized by a pore size within the range of 0.1㎛ to 200㎛.
9. In Paragraph 7, It has a porosity within the range of 30% to 90%, and ㅊ
10. In Paragraph 7, A method for manufacturing a porous metal material characterized by a thickness variation of 5% or less.
11. In Paragraph 7, A method for manufacturing a high-purity porous metal material characterized by a surface residual carbon concentration of 2.5 (At%) or less.

Description

Method for manufacturing a porous metal material and a porous metal material manufactured by the method The present invention relates to a method for manufacturing a high-purity porous metal material and a high-purity porous metal material manufactured by said method. Specifically, it relates to a method for manufacturing a porous metal material having uniform porosity and minimized thickness variation using a co-solvent, and to a porous metal material manufactured by said method. In general, porous metal materials are metal materials containing numerous pores that possess various characteristics such as thermal insulation, fire resistance, and eco-friendliness, and are utilized in various fields including structures, transportation machinery, building materials, and energy absorption devices. As a prior patent related to the present invention, Korean Patent Registration No. 2063049, "Method for manufacturing metal foam," has been proposed. Conventional methods for manufacturing porous metal materials, such as Korean Patent Registration No. 2063049 "Method for manufacturing metal foam," involve preparing a metal slurry by mixing metal powder, a solvent, and a binder, then coating and drying the slurry to a specific thickness, and finally sintering it. Korean Patent Registration No. 2063049 "Method for manufacturing metal foam" uses alkyl cellulose, polyalkylene carbonate, or polyvinyl alcohol compounds as binders. Korean Patent Registration No. 2063049 "Method for manufacturing metal foam" had a problem in that the compatibility between the binder and the solvent was low, resulting in low uniformity of mixing in the slurry, which caused the uniformity of porosity to decrease and thickness variation to occur in the metal foam manufactured by sintering the slurry, leading to defects caused by variations in porosity and thickness. FIG. 1 is a flowchart illustrating one embodiment of a method for manufacturing a porous metal material according to the present invention. FIG. 2 is a plan view showing the division of zones for checking thickness variation in one embodiment of a porous metal material manufactured by the method for manufacturing a porous metal material according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. FIG. 1 is a flowchart illustrating an embodiment of a method for manufacturing a high-purity porous metal material according to the present invention, and an embodiment of a method for manufacturing a high-purity porous metal material is described in detail below with reference to FIG. 1. One embodiment of the method for manufacturing a high-purity porous metal material according to the present invention includes a slurry manufacturing step (S100) for manufacturing a slurry for a porous metal material by mixing a metal component, a solvent, a binder, and a co-solvent, and a sintering step (S300) for sintering the slurry manufactured in the slurry manufacturing step (S100). In addition, one embodiment of the method for manufacturing a porous metal material according to the present invention further includes a precursor molding step (S200) in which a slurry for a porous metal material prepared in a slurry manufacturing step (S100) is molded into a precursor before a sintering step (S300). The precursor molding step (S200) involves molding a slurry for a porous metal material into the shape of the porous metal material to be manufactured, and is exemplified by molding it into a film, sheet, or panel shape, but can also be molded into various other shapes of known porous metal materials. The slurry manufacturing step (S100) involves mixing a metal component, a solvent, a binder, and a co-solvent to form a slurry for a porous metal material, and using ethylene carbonate (EC) as the binder is used as an example. In addition, the slurry manufacturing step (S100) is exemplified by comprising 20% to 90% by weight of a metal component, 5% to 70% by weight of a solvent, 3% to 15% by weight of a binder, and 1% to 10% by weight of a co-solvent in 100% by weight of the total slurry for a porous metal material. It is noted that the metal component may be copper powder or nickel powder as an example, and may also be used in combination of one or more selected from the group consisting of tin, aluminum, molybdenum, silver, platinum, gold, aluminum, magnesium, and iron. It should be noted that the metal component may be in the form of metal powder with an average particle size in the range of about 0.1 μm to about 200 μm, and that an appropriat