Fast synthesis and consolidation of porous FeAl by pressureless Spark Plasma Sintering

We report one-step fast synthesis and consolidation of iron aluminide FeAl of high open porosity by pressureless reactive Spark Plasma Sintering (SPS). The starting material of the Fe-40at.%Al composition was a mixture of an iron powder with an average particle diameter of 4 μm and an aluminum powde...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-07, Vol.218 (1), p.12003
Main Authors: Dudina, D V, Brester, A E, Anisimov, A G, Bokhonov, B B, Legan, M A, Novoselov, A N, Skovorodin, I N, Uvarov, N F
Format: Article
Language:English
Subjects:
Aluminum
Compacts
Consolidation
Creep rupture strength
Ferrous alloys
Intermetallic compounds
Iron aluminides
Particle size
Plasma sintering
Porosity
Sintering (powder metallurgy)
Spark plasma sintering
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Summary:We report one-step fast synthesis and consolidation of iron aluminide FeAl of high open porosity by pressureless reactive Spark Plasma Sintering (SPS). The starting material of the Fe-40at.%Al composition was a mixture of an iron powder with an average particle diameter of 4 μm and an aluminum powder with an average particle diameter of 6 μm. The rationale behind the choice of the SPS as a processing technique and fine and comparable sizes of the two reactants for the synthesis of high-open porosity FeAl was realization of fast full chemical conversion of Fe and Al into single-phase FeAl reducing the time available for the compact shrinkage. According to the XRD phase analysis, single-phase FeAl compacts formed after SPS at 800 and 900°C. These compacts had open porosities of 41 and 46%, respectively. The transverse rupture strength of the compacts sintered at 700-900°C was found to change little with the sintering temperature in the selected range.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/218/1/012003