Composite Powder and Compacts of Iron/Iron Oxide Type Produced by Mechanosynthesis and Reactive Sintering

Abstract:

Composite powder of Fe/Fe₂O₃ type was synthesized by mechanical milling using commercially Fe and Fe₂O₃ powders in mass ratio of 35/65. The milling process leads to the powder homogenization, powder activation and formation of some Fe/Fe₂O₃ composite particles. The Fe/Fe₂O₃ composite powder obtained by mechanical milling and the un-milled Fe/Fe₂O₃ mixture were subjected to the reactive sintering procedure in argon atmosphere at 1100 °C for 6 hours. The sintering procedure promotes the reaction of the Fe with the Fe₂O₃ and the result is a sintered composite compact of Fe/Fe₃O₄/FeO type. The microstructure of the Fe/Fe₃O₄/FeO sintered composite compacts presents iron clusters in an oxide matrix. A more homogeneous iron clusters size and distribution in oxide matrix is observed in the case of the sintered compact obtained from mechano-activated powder. The X-ray diffraction (XRD), laser particles size analysis (LPSA), optical (OM) and scanning electron (SEM) microscopies techniques were used for the investigations.

• Periodical: Solid State Phenomena (Volume 216)
• Pages: 29-34
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.216.29
• Online since: August 2014
• Authors: Traian Florin Marinca*, Bogdan V. Neamţu, Florin Popa, Ionel Chicinaş, Olivier Isnard
• Keywords: Iron Oxide, Iron/Iron Oxide Compacts, Mechanosynthesis, Nanocomposite Powder, Reactive Sintering

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