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Materials 2009, 2(4), 2360-2368; doi:10.3390/ma2042360
Article

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

*  and
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)
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Abstract

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.
Keywords: combustion foaming; Al3Ni; intermetallics; self-propagating high-temperature synthesis; exothermic reaction combustion foaming; Al3Ni; intermetallics; self-propagating high-temperature synthesis; exothermic reaction
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.

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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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