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Fabrication and evaluation of oxidation resistance performance of open-celled Fe(Al) foam by space-holder technique

Authors
Journal
Advanced Powder Technology
0921-8831
Publisher
Elsevier
Volume
25
Issue
3
Identifiers
DOI: 10.1016/j.apt.2014.01.020
Keywords
  • Ferrous Alloy
  • Mechanical Alloying
  • Metal Foam
  • Space-Holder
  • High Temperature Oxidation

Abstract

Abstract First, fabrication of Fe(Al) open-cell foams by using space-holder technique, in which NaCl powder and polyester resin were utilized as space holder and binder, was investigated. Fe(Al) powder were prepared via mechanical alloying method after 5h milling process. Then, the influences of fabrication parameters, alloying element Al content, time of milling process, sintering temperature and soaked time on the oxidation resistance performance of foam specimens at 800°C were mainly studied. The experimental results exhibit that alloying with 2wt.% Al resulted in acceleration of the oxidation rate of foam samples, additionally, alloying with 4wt.% Al had a little positive effect on oxidation rate at 800°C. However, the oxidation resistance of the 10wt.% Al-containing sample greatly improves compared to pure Fe. In addition, the oxidation resistance performance of prepared foam was improved by increasing the milling time up to 15h, and followed by a decrease gradually. The increase of sintering temperature and the prolongation of soaked time to 1100°C and 90min, respectively had significant positive effect on the oxidation resistance.

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