日本金属学会誌

J. Japan Inst. Metals, Vol. 75, No. 6 (2011),
pp. 355-360

The Improvement of Mechanical Properties of Metallic Foams by Carbonates as a Foaming Agent

Takuya Koizumi1, Kota Kido1, Kazuhiko Kita1, Koichi Mikado2, Svyatoslav Gnyloskurenko3 and Takashi Nakamura3

1Machinery and Engineering Group, YKK Corporation, Kurobe 938-8601
2Fastening Products Group, YKK Corporation, Kurobe 938-8601
3Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577

Abstract:

Metallic foams are commonly produced using hydride foaming agents. Carbonates are safer to handle than hydrides; furthermore a fine and homogenous cell structure can be obtained in the powder metallurgy route. In this study, the effects of mass fraction of magnesium carbonate and dolomite as a foaming agent on cell structure and mechanical properties of the foams were investigated. Dolomite gave more fine and homogenous cell structure than magnesium carbonate. Average cell size of the foam by dolomite was twenty times less than that of the foam by TiH2. The dolomite-foam showed higher plateau stress than the TiH2-foam; therefore, dolomite-foam has high energy absorbing capability.


(Received 2011/1/17)

Keywords:

foaming agent, metallic foam, magnesium carbonate, dolomite, energy absorbing capability


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