Vapor phase dealloying kinetic analysis and mechanical properties of nanoporous copper-silver
Journal
Materials Today Communications
Journal Volume
48
Start Page
113496
ISSN
2352-4928
Date Issued
2025-09
Author(s)
Abstract
The vapor phase dealloying (VPD) process is a recyclable method for synthesizing nanoporous metals without producing chemical waste, such as nanoporous Cu (NPC) from Cu-Zn precursor alloys. However, a systematic study utilizing the VPD method to synthesize bimetallic nanoporous materials from a ternary precursor system is absent. In this study, nanoporous copper-silver (NPCS) synthesized from Cu-Ag-Zn precursor alloy was chosen to explore the effect of an additional noble metal on the kinetic analysis and mechanical properties via the VPD process. The results indicate that silver suppresses the diffusion and rearrangement of the remaining atoms during VPD. The ligament size of the NPCS is smaller than that of the NPC under the same VPD conditions, while increasing the energy absorption capacity of NPCSs to 75.4 MJ/cm³. Moreover, the growth of bimetallic ligaments involves forming an intermediate phase. Through different VPD times and temperatures, the calculated activation energy for ligament growth was between 1.3 eV and 1.57 eV, suggesting that the formation of the bimetallic ligament is probably dominated by grain boundary diffusion or interphase boundary diffusion.
Subjects
Bimetallic
Copper-silver
Energy absorption
Nanoporous structure
Vapor phase dealloying
Publisher
Elsevier BV
Type
journal article