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A Self-Propagating Foaming Process of Porous Al-Ni Intermetallics Assisted by Combustion Reactions

Graduate School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya, Aichi 4648603, Japan
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Materials 2009, 2(4), 2360-2368; https://doi.org/10.3390/ma2042360
Received: 29 October 2009 / Revised: 3 December 2009 / Accepted: 14 December 2009 / Published: 15 December 2009
(This article belongs to the Special Issue Porous Materials)
The self-propagating foaming process of porous Al-Ni intermetallics was investigated. Aluminum and nickel powders were blended, and titanium and boron carbide powders were added as reactive exothermic agents. The blended powder was extruded to make a rod-shape precursor. Only one end of the rod precursor was heated to ignite the reaction. The reaction propagated spontaneously throughout the precursor. Pore formation took place at the same time as the reaction occurred. Adding the exothermic agent was effective to increase the porosity. Preheating the precursor before the ignition was also very effective to produce porous Al-Ni intermetallics with high porosity. View Full-Text
Keywords: combustion foaming; Al3Ni; intermetallics; self-propagating high-temperature synthesis; exothermic reaction combustion foaming; Al3Ni; intermetallics; self-propagating high-temperature synthesis; exothermic reaction
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Kobashi, M.; Kanetake, N. A Self-Propagating Foaming Process of Porous Al-Ni Intermetallics Assisted by Combustion Reactions. Materials 2009, 2, 2360-2368.

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