Obtaining nano-porous bulk Cu through dealloying bulk Cu alloys in a corrosive solution is a challenge due to Intergranular stress-corrosion cracking (IGSCC). In this study, a novel approach involving Cu30Mn70 solid solution alloyed with Si was reported to fabricate Nano-Porous Bulk Cu (NPBC), and then the NPBC was characterized by XRD, SEM, EDS, BET and three-point bending testing. Results suggest that silicon has a positive impact on eliminating IGSCC. When the Si content is up to 2.0 (wt.) %, the IGSCC will be excluded, and then the NPBC will be obtained with a bending strength up to 10.2 MPa.

Subject
X-ray diffraction, Test methods, Energy dispersive X-ray spectroscopy, Materials, Intergranular stress corrosion cracking, Solid solutions, Copper alloys, Mechanical properties, Bending, Silicon, Engineering, Dealloying, Stress corrosion cracking
Keywords:
Dealloying, Copper alloy, Porous materials, Mechanical properties, Crack
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2025
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