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

By Makoto Kobashi and Naoyuki Kanetake

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

Topics: combustion foaming, Al3Ni, intermetallics, self-propagating high-temperature synthesis, exothermic reaction, Materials of engineering and construction. Mechanics of materials, TA401-492, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Technology, T, DOAJ:Materials, DOAJ:Technology and Engineering, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
Publisher: MDPI AG
Year: 2009
DOI identifier: 10.3390/ma2042360
OAI identifier: oai:doaj.org/article:0bde7d669d9e419e8676a041c25ff6c4
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