6533b836fe1ef96bd12a07d4

RESEARCH PRODUCT

Synthesis of bulk FeAl nanostructured materials by HVOF spray forming and Spark Plasma Sintering

Frédéric BernardZuhair A. MunirEric GaffetThierry GrosdidierSébastien LaunoisGang JiGang JiGang Ji

subject

Materials scienceScanning electron microscopeMechanical EngineeringMetallurgyMetals and AlloysSpark plasma sinteringFEALGeneral ChemistryMicrostructureSpray formingMechanics of MaterialsTransmission electron microscopyMaterials ChemistryThermal sprayingPorosity

description

Abstract This paper examines the efficiency of two consolidation processing techniques: High Velocity Oxy-Fuel (HVOF) spray forming and Spark Plasma Sintering (SPS) to obtain bulk nanostructured materials from an Y 2 O 3 reinforced Fe–40Al (at.%) milled powder. The microstructures of the sintered end-products were characterized by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) in order to gain new insights in their microstructure formation mechanisms. HVOF spray forming is more effective to retain fine nanograins, in particular within retained unmelted powder particles. The drawbacks of this technique are that it inevitably leads to a high fraction of porosity and, because of lack of wetting, large areas (the melted zones) without any Y 2 O 3 oxide. Comparatively, SPS has a much higher potential to create sub-micrometer microstructures within which the oxides are more homogeneously distributed.

yearjournalcountryeditionlanguage
2006-10-01Intermetallics
https://doi.org/10.1016/j.intermet.2005.11.033