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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F12%3A43894306%21RIV15-GA0-22310___
rdf:type
skos:Concept n18:Vysledek
rdfs:seeAlso
http://metal2012.tanger.cz/files/proceedings/02/reports/264.pdf
dcterms:description
Fe-Al alloys have been known for more than 100 years. Their exceptional oxidation and sulphidation resistance makes them promising for many industrial applications. However, these materials suffer from poor room-temperature ductility and problems during a production by conventional melting metallurgy. Therefore, reactive sintering of iron and aluminium compressed powder mixtures have been proposed as the alternative technology of their production. Unfortunately, this production technology leads to highly porous products. There are many theories why the porosity is so high and all of them deal with the intermetallic phases' formation mechanisms. There are at least three different phases' formation sequences during heating described in the literature. In this work, the in situ high energy X-ray diffraction analysis was carried out during the reactive sintering process and the mechanism of the formation of intermetallics in FeAl25 powder mixture was described during isothermal annealing at 800°C as well as during a slow continuous heating to this temperature. In both cases, no phases are formed prior the melting of aluminium particles. After that, Fe2Al5 and FeAl phases arise. The effect of the intermetallics' formation on the porosity of Fe-Al alloys is discussed. Fe-Al alloys have been known for more than 100 years. Their exceptional oxidation and sulphidation resistance makes them promising for many industrial applications. However, these materials suffer from poor room-temperature ductility and problems during a production by conventional melting metallurgy. Therefore, reactive sintering of iron and aluminium compressed powder mixtures have been proposed as the alternative technology of their production. Unfortunately, this production technology leads to highly porous products. There are many theories why the porosity is so high and all of them deal with the intermetallic phases' formation mechanisms. There are at least three different phases' formation sequences during heating described in the literature. In this work, the in situ high energy X-ray diffraction analysis was carried out during the reactive sintering process and the mechanism of the formation of intermetallics in FeAl25 powder mixture was described during isothermal annealing at 800°C as well as during a slow continuous heating to this temperature. In both cases, no phases are formed prior the melting of aluminium particles. After that, Fe2Al5 and FeAl phases arise. The effect of the intermetallics' formation on the porosity of Fe-Al alloys is discussed.
dcterms:title
Formation of Intermetallics during Reactive Sintering Production of Fe-Al Alloys Formation of Intermetallics during Reactive Sintering Production of Fe-Al Alloys
skos:prefLabel
Formation of Intermetallics during Reactive Sintering Production of Fe-Al Alloys Formation of Intermetallics during Reactive Sintering Production of Fe-Al Alloys
skos:notation
RIV/60461373:22310/12:43894306!RIV15-GA0-22310___
n3:aktivita
n22:P
n3:aktivity
P(GBP108/12/G043)
n3:dodaniDat
n16:2015
n3:domaciTvurceVysledku
n7:8144842 n7:9782699 n7:3344495
n3:druhVysledku
n15:D
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
136997
n3:idVysledku
RIV/60461373:22310/12:43894306
n3:jazykVysledku
n17:eng
n3:klicovaSlova
XRD; reactive sintering; iron aluminide
n3:klicoveSlovo
n6:XRD n6:reactive%20sintering n6:iron%20aluminide
n3:kontrolniKodProRIV
[CE5BFFC030B8]
n3:mistoKonaniAkce
Brno
n3:mistoVydani
Ostrava
n3:nazevZdroje
Proceedings of 21st International Conference on Metallurgy and Materials
n3:obor
n14:JK
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
6
n3:projekt
n20:GBP108%2F12%2FG043
n3:rokUplatneniVysledku
n16:2012
n3:tvurceVysledku
Marek, Ivo Michalcová, Alena Bednarčík, Josef Novák, Pavel Mudrová, Martina Saksl, Karel
n3:typAkce
n8:EUR
n3:wos
000318506500200
n3:zahajeniAkce
2012-05-23+02:00
s:numberOfPages
4
n19:hasPublisher
Tanger s.r.o.
n12:isbn
978-80-87294-29-1
n5:organizacniJednotka
22310