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Anisotropic Mechanical Properties of Nickel Foams Fabricated by Powder Metallurgy

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Abstract:

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.

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Periodical:

Materials Science Forum (Volume 569)

Pages:

277-280

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.569.277

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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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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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