期刊
CORROSION SCIENCE
卷 90, 期 -, 页码 216-222出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.10.014
关键词
Alloy; Potentiostatic; SEM; De-alloying; Alkaline corrosion
资金
- Natural Science Foundation of China [50871047, 51271087]
- National Nature Science Foundation [51301076]
Bulk NPC (nanoporous copper) were fabricated by dealloying xAl(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 Al2Cu and AlCu results in the formation of uniform NPC with small-sized channels. The dealloying of alpha-Al and Al2Cu 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. (C) 2014 Elsevier Ltd. All rights reserved.
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