Paper Title:

Anisotropic Mechanical Properties of Nickel Foams Fabricated by Powder Metallurgy

Periodical Materials Science Forum (Volume 569)
Main Theme Eco-Materials Processing and Design IX
Edited by Byungsei Jun, Hyungsun Kim, Chanwon Lee, Soo Wohn Lee
Pages 277-280
DOI 10.4028/www.scientific.net/MSF.569.277
Citation Yasuo Yamada et al., 2008, Materials Science Forum, 569, 277
Online since January 2008
Authors Yasuo Yamada, Takumi Banno, Yun Cang Li, Cui E Wen
Keywords Anisotropic Properties, Aspect Ratio, Mechanical Property, Nickel Foam
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In the present study, porous nickel foam samples with pore sizes of 20 μm and 150 μm and porosities of 60 % and 70 % were fabricated by the space-holding sintering method via powder metallurgy. Electron scanning microscopy (SEM) and Image-Pro Plus were used to characterise the morphological features of the porous nickel foam samples. The anisotropic mechanical properties of porous nickel foams were investigated by compressive testing loading in different directions, i.e. the major pore axis and minor pore axis. Results indicated that the nominal stress of the nickel foam samples increases with the decreasing of the porosity. Moreover, the foam sample exhibited significantly higher nominal stress for loading in the direction of the major pore axis than loading in direction of the minor pore axis. It is also noticeable that the nominal stress of the nickel foams increases with the decreasing of the pore size. It seems that the deformation behaviour of the foams with a pore size in the micron-order differs from those with a macro-porous structure.