논문 상세보기
알칼리 표면개질을 통한 다공성 알루미늄 합금의 하이브리드 기공구조 형성 KCI 등재
The Formation of Hybridized Porous Structure of Al Alloy by Alkali Surface Modification
- 언어KOR
- URLhttps://db.koreascholar.com/Article/Detail/2649
pp.22-27
To improve the filtration efficiency of porous materials used in filters, an extensive specific surface area is required to serve as a site for adsorption of impurities. In this paper, a method for creating a hybridized porous alloy using a powder metallurgical technique to build macropores in an Al-4 wt.% Cu alloy and subsequent surface modification for a microporous surface with a considerably increased specific surface area is suggested. The macropore structure was controlled by granulation, compacting pressure, and sintering; the micropore structure was obtained by a surface modification using a dilute NaOH solution. The specific surface area of surface-modified specimen increased about 10 times compare to as-sintered specimen that comprised of the macropore structure. Also, the surface-modified specimens showed a remarkable increase in micropores larger than 10 nm. Such a hybridized porous structure has potential for application in water and air purification filters, as well as membrane pre-treatment and catalysis.
