Mechanical properties of spark plasma sintered FeAl intermetallics

Skiba, Tomas; Haušild, Petr; Karlı́k, Miroslav; Vanmeensel, Kim; Zhang, Fei

doi:10.1016/j.intermet.2010.02.009

Cited by 41 publications

(24 citation statements)

References 23 publications

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“…[100] Processing of intermetallic materials commonly involves a prior mixing process of the basis metals by mechanical activation to form a solid solution followed by the consolidation of the obtained intermetallic compound by sintering. FAST/SPS leads to the full densification of the specimens with a finer microstructure in comparison with conventional techniques, [101] allowing dense materials with grains in the nano-scale range, as shown for Ni 3 Al, [102,103] FeAl, [104,105] and TiAl. [106][107][108] More examples of sintered intermetallic materials are reviewed by Orru et al [109] In order to increase the creep resistance at high temperature, second oxides phases are frequently added or formed in situ by mechanical alloying (oxide-dispersion-strengthening (ODS)).…”

Section: Refractory Metals and Intermetallicsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

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Field-assisted sintering technology/Spark plasma sintering is a low voltage, direct current (DC) pulsed current activated, pressure-assisted sintering, and synthesis technique, which has been widely applied for materials processing in the recent years. After a description of its working principles and historical background, mechanical, thermal, electrical effects in FAST/SPS are presented along with the role of atmosphere. A selection of successful materials development including refractory materials, nanocrystalline functional ceramics, graded, and non-equilibrium materials is then discussed. Finally, technological aspects (advanced tool concepts, temperature measurement, finite element simulations) are covered.

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Section: Refractory Metals and Intermetallicsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

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“…The microstructures of both SPS SP and DP specimens were homogeneous with only very low amounts of ne pores and remnants of ne oxides on particle boundaries [24]. For all the plasma sprayed coatings the typical microstructure consisted of attened splats created from fully molten powders and partially unmolten particles.…”

Section: Resultsmentioning

confidence: 96%

“…Further processing details as well as the mechanical properties of FeAl SPS compacts and plasma sprayed coatings can be found in Refs. [24,25].…”

Section: Methodsmentioning

confidence: 99%

High Temperature Oxidation of Spark Plasma Sintered and Thermally Sprayed FeAl-Based Iron Aluminides

et al. 2012

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The presented work deals with the oxidation resistance of spark plasma sintered and thermally sprayed FeAl-based intermetallics. Gas-atomized binary single phase Fe43(at.%)Al and dual phase Fe55(at.%)Al powders were used for spark plasma sintering and/or thermal spraying. Coatings were deposited by two dierent plasma spray technologies gas and water stabilized plasma guns. The prepared samples were exposed to oxidation in articial air at 700• C. The mass gain was measured during oxidation at 700• C up to 1000 h. Microstructures, phase and chemical compositions of the formed scales were characterized after the exposition by means of scanning electron microscopy, X-ray diraction and electron spectroscopy for chemical analysis (X-ray photoelectron spectroscopy).

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“…The Fe-Al type protective coatings deposited onto the steel substrate evince very useful properties like good micro-hardness, adhesion, resistance to corrosion at high temperature, low porosity, resistance to abrasive wear, good lubricating abilities and tightness, [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, industrial application the Fe-Al type coating is limited due to the poor ductility and fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

D-gun Sprayed Fe-Al Single Particle Solidification

Wołczyński¹,

Senderowski²,

Morgiel³

et al. 2014

Archives of Metallurgy and Materials

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Some Fe-Al particles less than 50 µm in diameter were deposited onto the steel substrate by means of the D-gun spraying. A solidification mechanism of an individual particle is described. The particle subjected to the description contained nominally 63 at.% Al. The description was preceded by the TEM / SAED analysis of both the Fe-Al coating and Ni-20Cr interlayer. The whole number of the analyzed particles was partially melted during the deposition. The solidification products like: amorphous phase sub-layer, oscillatory sub-layer which contains two types lamellae distributed alternately and typically non-equilibrium phase sub-layer were revealed. In the micro scale, solidification was considered as a process which occurred in two directions: towards the substrate and towards the non-melted particle part. Both solidification processes underwent the positive thermal gradients. The boron addition was localized within the eutectic precipitates pushed and then rejected by the solid/liquid interface of the solidifying non-equilibrium phase. The proposed model is a general one and therefore can be applied to other systems description.Keywords: Fe-Al coating, Ni-20Cr interlayer, rapid solidification, D-gun spraying, boron localization, competitive growth of phases Cząstki proszku Fe-Al mniejsze niż 50 µm w średnicy zostały osadzone detonacyjnie na podłożu stalowym. Opisuje się mechanizm krystalizacji pojedynczej cząstki. Cząstki poddane opisowi zawierały nominalnie 63 at.% Al. Opis poprzedzono badaniami struktury metodą TEM / SAED dotyczącymi zarówno powłoki Fe-Al jak i międzywarstwy Ni-20Cr. Wszystkie analizowane cząstki były częściowo nadtopione podczas osadzania. Zidentyfikowano produkty krystalizacji takie jak: podwarstwę amorficzną, podwarstwę oscylacyjną zawierającą periodycznie ułożone płytki dwu faz oraz podwarstwę zawierającą fazę typowo nierównowagową. W mikroskali proces wzrostu faz jest analizowany jako zachodzący w dwu kierunkach: w stronę podłoża i w stronę niestopionej części cząstki. Obydwa procesy wzrostu zachodziły w obecności dodatniego gradientu temperatury. Bor dodany do powłoki został zlokalizowany w eutektyce odepchniętej przez front krystalizacji fazy typowo nierównowagowej. Proponowany model ma charakter ogólny i może być zastosowany do opisu innych systemów.

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Mechanical properties of spark plasma sintered FeAl intermetallics

Cited by 41 publications

References 23 publications

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

High Temperature Oxidation of Spark Plasma Sintered and Thermally Sprayed FeAl-Based Iron Aluminides

D-gun Sprayed Fe-Al Single Particle Solidification

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