Study on Micron Porous Copper Prepared by Physical Vacuum Dealloying

doi:10.1007/s40195-016-0505-z

Abstract

Abstract:

Porous copper was prepared successfully by physical vacuum dealloying method using the CuZn alloy precursors (Cu30Zn70, Cu40Zn60 and Cu50Zn50 alloys). The micron porous copper showed a three-dimensional continuous porous structure with 1-5 μm pore size. With the increase of the Zn content in the CuZn alloy, the pore structure of the porous copper was more uniform and ordered. Temperature was the key factor for physical dealloying, and the optimized temperature was 500 °C for the CuZn alloy. The pores would fuse and disappear when the temperature was over 500 °C. Physical vacuum dealloying was an effective preparation method for porous copper, which can be used to prepare other porous metals based on the sublimation and the Kirkendall effect.

Key words: Dealloying, Sublimation, Kirkendall effect, Porous copper, Cu-Zn alloy

Yi-Bin Ren,Yu-Xia Sun,Ke Yang. Study on Micron Porous Copper Prepared by Physical Vacuum Dealloying[J]. Acta Metallurgica Sinica (English Letters), 2016, 29(12): 1144-1147.

Figures/Tables 5

Fig. 1 XRD patterns of Cu50Zn50, Cu40Zn60 and Cu30Zn70 precursor alloys before (a-c), after (d) physical vacuum dealloying

Fig. 2 SEM images and EDS analysis of Cu50Zn50 alloy after physical vacuum dealloying

Fig. 3 SEM images and EDS analysis of Cu40Zn60 alloy after physical vacuum dealloying

Fig. 4 SEM images and EDS analysis of Cu30Zn70 alloy after physical vacuum dealloying

Fig. 5 SEM images of Cu30Zn70 alloy after physical dealloying at 600 (a), at 700 °C (b)

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