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Al-coated iron particles: Synthesis, characterization and improvement of oxidation resistance

✍ Scribed by F. Jay; V. Gauthier-Brunet; F. Pailloux; J. Mimault; S. Bucher; S. Dubois

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 408 KB
Volume: 202
Category: Article
ISSN: 0257-8972
DOI: 10.1016/j.surfcoat.2008.04.001

No coin nor oath required. For personal study only.

✦ Synopsis

A Fluidized Bed Metal Organic Chemical Vapour Deposition (FB-MOCVD) process has been successfully applied to coat Fe particles with Al. N 2 inert gas was used to transport the organometallic Al precursor (liquid triethylaluminium) inside the fluidized bed reactor whose temperature is 350 °C. XPS analyses and TEM observations have revealed the presence of a thin alumina layer surrounding the Al coating. Oxidation treatments, performed in the temperature range 350-500 °C, demonstrate that this multi-scale coating constitutes an efficient barrier to protect iron particles against oxidation. Such a treatment may be used to perform environmental barrier coatings around magnetic powders.

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