Seo, Young Ik 김영문 이영중 김대건 이규환 김영도 2024-01-20T22:01:51Z 2024-01-20T22:01:51Z 2021-09-06 2009-02 1225-7591 https://pubs.kist.re.kr/handle/201004/132761 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 ㎚. Such a hybridized porous structure has potential for application in water and air purification filters, as well as membrane pre-treatment and catalysis. Korean 한국분말야금학회 알칼리 표면개질을 통한 다공성 알루미늄 합금의 하이브리드 기공구조 형성 The Formation of Hybridized Porous Structure of Al Alloy by Alkali Surface Modification Article 2 한국분말야금학회지, v.16, no.1, pp.22 - 27 한국분말야금학회지 16 1 22 27 N kci ART001320118 Porous surface Pore structure control Alkali surface modification Hybrid pore structure