MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Synthesis and Characterization of Nanocrystalline Iron Aluminide Intermetallic Compounds
Wangyu HuTakayuki KatoMasahiro Fukumoto
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2003 Volume 44 Issue 12 Pages 2678-2687

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Abstract

Refining grain size to the nanocrystalline level has been suggested as a way of improving strength while enhancing ductility and toughness. In the present study, nanocrystalline iron aluminide intermetallic compounds were synthesized using mechanical alloying, sintering and high velocity oxy-fuel (HVOF) thermal spraying from the elemental powders. The phase changes occurred during milling, thermal spraying and annealing studied from magnetic and structural points of view. XRD, SEM, DSC and dynamic ultra-microhardness tester were used for examining the microstructure, thermal stability, mechanical properties and wear behavior of the milled powders and coatings. The current results demonstrated that, by controlling the experimental conditions, it was possible to prepare iron aluminide intermetallic compound with nano-size grains.

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© 2003 Japan Thermal Spraying Society
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