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Title

Amorphous and nanostructuredAl–Fe–Ndpowders obtained by gasatomization

AuthorsCardoso, Kátia Regina; García Escorial, Asunción; Lieblich, Marcela ; Botta F, W.J.
KeywordsAmorphous
Nanostructure
Aluminium
Atomization
Issue Date2001
PublisherElsevier
CitationMaterials Science and Engineering:A 315 (1-2) : 89-97 (2001)
AbstractIn this work, an Al90Fe5Nd5 alloy was atomized and its microstructure, thermal stability, transformation sequence and microhardness investigated as a function of powder particle size. The atomized powder contained on average a 25% volume fraction of amorphous materials, reaching 42% in the <25 μm size range. With thermal treatments the material evolved through three exothermic reactions, which involved the formation of a nanostructured state Fe- and Nd-enriched amorphous matrix+fcc-Al nanocrystals at 240°C, the formation of a metastable ternary phase at 360°C and, finally, the formation of the equilibrium Al10Fe2Nd and Al11Nd3 phases. The high thermal stability of the amorphous+fcc-Alnanostructured state, 120°C, and the high hardness, 280 Hv, of this alloy make it a good candidate for consolidate bulk material for technological applications
URIhttp://hdl.handle.net/10261/56152
DOI10.1016/S0921-5093(01)01197-2
ISSN0921-5093
Appears in Collections:(CENIM) Artículos
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