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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F10%3A00440394%21RIV15-GA0-68081723
rdf:type
n17:Vysledek skos:Concept
dcterms:description
A NiAl-Mo eutectic alloy was melt from 99,99% purity components and cast by the drop casting technique. The drop-cast ternary alloy (nominal composition of Ni-45Al-9Mo at. %), was re-melted and directionally solidified using a high temperature optical floating zone furnace. A resulting in-situ composite consists of Ni-45,2Al matrix and Mo-10Al-4Ni fibers, all in at. %. The volume fraction of 14% Mo-fibers stems from the eutectic composition. Backscatter diffraction shows that the NiAl-matrix and the Mo-fibers are both < 001 >-oriented with respect to the axis of the cylindrical rods. Preliminary creep experiments confirmed an immense improvement of high temperature strength due to the fine distribution of Mo-fibres. The amount of strengthening in terms of minimum creep rate can be as high as 7 orders of magnitude. Post-mortem transmission electron microscopy experiments provided evidence that creep in the temperature range of 800 - 900 degrees C results in an extensive formation of subgrain boundaries. The strengthening effect is very likely associated with the reactions between subgrain boundaries and fine Mo-fibres. A NiAl-Mo eutectic alloy was melt from 99,99% purity components and cast by the drop casting technique. The drop-cast ternary alloy (nominal composition of Ni-45Al-9Mo at. %), was re-melted and directionally solidified using a high temperature optical floating zone furnace. A resulting in-situ composite consists of Ni-45,2Al matrix and Mo-10Al-4Ni fibers, all in at. %. The volume fraction of 14% Mo-fibers stems from the eutectic composition. Backscatter diffraction shows that the NiAl-matrix and the Mo-fibers are both < 001 >-oriented with respect to the axis of the cylindrical rods. Preliminary creep experiments confirmed an immense improvement of high temperature strength due to the fine distribution of Mo-fibres. The amount of strengthening in terms of minimum creep rate can be as high as 7 orders of magnitude. Post-mortem transmission electron microscopy experiments provided evidence that creep in the temperature range of 800 - 900 degrees C results in an extensive formation of subgrain boundaries. The strengthening effect is very likely associated with the reactions between subgrain boundaries and fine Mo-fibres.
dcterms:title
METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS
skos:prefLabel
METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS METALLURGY AND PROPERTIES OF ADVANCED NiAl-Mo EUTECTICS
skos:notation
RIV/68081723:_____/10:00440394!RIV15-GA0-68081723
n3:aktivita
n9:P n9:Z
n3:aktivity
P(GA202/09/2073), Z(AV0Z20410507)
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n5:1023705 n5:3249514 n5:9671315 n5:5076633
n3:druhVysledku
n21:D
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
270617
n3:idVysledku
RIV/68081723:_____/10:00440394
n3:jazykVysledku
n20:eng
n3:klicovaSlova
eutectics; directional solidification; composite
n3:klicoveSlovo
n7:eutectics n7:directional%20solidification n7:composite
n3:kontrolniKodProRIV
[ED7A4ED2D72F]
n3:mistoKonaniAkce
Rožnov pod Radhoštěm
n3:mistoVydani
Ostrava
n3:nazevZdroje
METAL 2010: 19TH INTERNATIONAL METALLURGICAL AND MATERIALS CONFERENCE
n3:obor
n12:JG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n19:GA202%2F09%2F2073
n3:rokUplatneniVysledku
n13:2010
n3:tvurceVysledku
Dlouhý, Antonín Záležák, Tomáš Kuchařová, Květa Barták, Tomáš
n3:typAkce
n15:EUR
n3:wos
000286658700154
n3:zahajeniAkce
2010-05-18+02:00
n3:zamer
n18:AV0Z20410507
s:numberOfPages
5
n16:hasPublisher
TANGER LTD
n4:isbn
978-80-87294-17-8