Metals 2012, 2(1), 1-9; doi:10.3390/met2010001

Method of Preventing Shrinkage of Aluminum Foam Using Carbonates

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Received: 23 September 2011; in revised form: 7 December 2011 / Accepted: 15 December 2011 / Published: 23 December 2011
(This article belongs to the Special Issue Metal Foams)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Metallic foams are commonly produced using titanium hydride as a foaming agent. Carbonates produce aluminum foam with a fine and homogenous cell structure. However, foams produced using carbonates show marked shrinkage, which is clearly different from those produced using titanium hydride. It is essential for practical applications to clarify foam shrinkage and establish a method of preventing it. In this research, cell structures were observed to study the shrinkage of aluminum foam produced using carbonates. The cells of foam produced using dolomite as a foaming agent connected to each other with maximum expansion. It was estimated that foaming gas was released through connected cells to the outside. It was assumed that cell formation at different sites is effective in preventing shrinkage induced by cell connection. The multiple additions of dolomite and magnesium carbonate, which have different decomposition temperatures, were applied. The foam in the case with multiple additions maintained a density of 0.66 up to 973 K, at which the foam produced using dolomite shrank. It was verified that the multiple additions of carbonates are effective in preventing shrinkage.
Keywords: aluminum foam; carbonates; shrinkage
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MDPI and ACS Style

Koizumi, T.; Kido, K.; Kita, K.; Mikado, K.; Gnyloskurenko, S.; Nakamura, T. Method of Preventing Shrinkage of Aluminum Foam Using Carbonates. Metals 2012, 2, 1-9.

AMA Style

Koizumi T, Kido K, Kita K, Mikado K, Gnyloskurenko S, Nakamura T. Method of Preventing Shrinkage of Aluminum Foam Using Carbonates. Metals. 2012; 2(1):1-9.

Chicago/Turabian Style

Koizumi, Takuya; Kido, Kota; Kita, Kazuhiko; Mikado, Koichi; Gnyloskurenko, Svyatoslav; Nakamura, Takashi. 2012. "Method of Preventing Shrinkage of Aluminum Foam Using Carbonates." Metals 2, no. 1: 1-9.

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