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• Kobashi, M
• Kanetake, N
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• Kobashi, M
• Kanetake, N
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• Kobashi, M
• Kanetake, N

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Materials 2012, 5(7), 1267-1274; doi:10.3390/ma5071267

Article

Effect of Elemental Powder Size on Foaming Behavior of NiTi Alloy Made by Combustion Synthesis

Yuya Arakawa* , Makoto Kobashi and Naoyuki Kanetake

Graduate School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya, Aichi 4648603, Japan

* Author to whom correspondence should be addressed.

Received: 6 April 2012; in revised form: 18 July 2012 / Accepted: 19 July 2012 / Published: 23 July 2012

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Abstract: Nickel titanium (NiTi) foams were made by combustion synthesis of powders with the help of ZrH₂ as foaming agent and TiB₂ as endothermic agent. In this paper, we investigated the effect of elemental powder size on the foaming. The powder size of Ni and Ti affected the ignition temperature of the combustion reaction, cell morphology and microstructure of the foams. The cell morphology of the foams was also modified by the powder size of TiB₂.

Keywords: intermetallic foam; porous material; combustion synthesis; nickel titanium; foaming agent

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