Open AccessFabrication of nanoporous metal by selective electrochemical dealloying from laser cladding Cu-Mn alloys
Author(s) -
Changsheng Dong,
Yu Gu,
Minlin Zhong,
Mingming Ma,
Ting Huang,
Wenjin Liu
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.094211
Subject(s) - materials science , nanoporous , alloy , microstructure , fabrication , electrolyte , electrochemistry , dissolution , porosity , chemical engineering , ribbon , metal , metallurgy , composite material , nanotechnology , electrode , pathology , chemistry , engineering , medicine , alternative medicine
The nanoporous metal is fabricated by means of hybrid laser processing in combination with electrochemical dealloying. Cu-Mn alloy coatings with fine shape, low dilute ratio and refined microstructure are fabricated on medium carbon steel by means of laser processing. Polarization curve indicates that the Cu-Mn alloy shows selective dissolution characteristics for different electrolytes. Nanoporous Cu and nanoporous Mn are fabricated with optimal electrochemically dealloying parameters. Nanoporous Cu has pore sizes rangeing from 30 to 50 nm, while the surface morphology of the porous Mn shows a ribbon-like structure with ultrahigh roughness factor up to 900. Finally, the potential-pH diagram is used to explain the mechanism of the dealloying.