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

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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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 (CC BY 3.0).

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MDPI and ACS Style

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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