Fabrication and characterization of bulk nanoporous copper by dealloying Al–Cu alloy slices. (January 2015)

• Record Type: Journal Article
• Authors: Li, Jie; Jiang, Huawei; Yu, Nana; Xu, Caixia; Geng, Haoran
• Is Part Of: Corrosion science. Volume 90(2015)
• Page Start: 216
• Page End: 222
• Publication Date: 2015-01
• Subjects: A. Alloy -- B. Potentiostatic -- B. SEM -- C. De-alloying -- C. Alkaline corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2014.10.014
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: 1.0 mm thick Al–Cu slices can be fully dealloyed under free corrosion conditions. Layer-cake nanoporous copper is fabricated from dealloying 70Al30Cu alloy. Current pulses in chronoamperometric line account for the appearance of layer-cake. Abstract: Bulk NPC (nanoporous copper) were fabricated by dealloying x Al(100− x )Cu ( x = 60, 70 at.%) alloy slices in NaOH solutions (10, 20 and 30 wt.%) under free corrosion conditions. The results show that Al–Cu alloy slices can be completely dealloyed. The synergetic dealloying of Al2 Cu and AlCu results in the formation of uniform NPC with small-sized channels. The dealloying of α-Al and Al2 Cu plays an important role in the formation of NPC with two kinds of structures of both small-sized uniform ligaments–channels and hierarchical skeleton-like (large-sized channels with highly porous walls) structure, and these two structures form layer-cake structure.