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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F05%3A00042956%21RIV07-AV0-61389005
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The objective of this work was the study of Li-6 diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV Li-6(+) ions into W and Ta thin foils (up to the fluence of 10(16) ions/cm(2)) and annealed up to the temperature 1940 degrees C. The depth profiles of Li-6 were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of Li-6 in both W and Ta foils is very complex and cannot be described by simple Fick's laws. Trapping centers (in the subsurface layers of both W and Ta metals) were supposed in a trial to explain the Li-6 diffusion behaviour. However, the Li-6 depth profiles were only partly explained. Other aspects are necessary to take into account for more proper quantification; such as spatially dependent diffusion coefficients, etc. Difúze izotopu 6Li v Ta a W byla studována pomocí nedestruktivní metody neutronového hloubkového profilování. Předběžné výsledky poukazují na složitou difúzi atomů 6Li ve wolframu a tantalu. Experiment potvrdil, že difúze podle Fickova zákona je ovlivněna přítomností pastí a radiačními defekty v povrchové vrstvě vzorku. Další experimenty a počítačové simulace difúzního procesu pokračují. The objective of this work was the study of Li-6 diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV Li-6(+) ions into W and Ta thin foils (up to the fluence of 10(16) ions/cm(2)) and annealed up to the temperature 1940 degrees C. The depth profiles of Li-6 were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of Li-6 in both W and Ta foils is very complex and cannot be described by simple Fick's laws. Trapping centers (in the subsurface layers of both W and Ta metals) were supposed in a trial to explain the Li-6 diffusion behaviour. However, the Li-6 depth profiles were only partly explained. Other aspects are necessary to take into account for more proper quantification; such as spatially dependent diffusion coefficients, etc.
dcterms:title
Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique Difúze 6- Li v tantalu a wolframu studovaná pomocí neutronového hloubkového profilování Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique
skos:prefLabel
Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique Difúze 6- Li v tantalu a wolframu studovaná pomocí neutronového hloubkového profilování
skos:notation
RIV/61389005:_____/05:00042956!RIV07-AV0-61389005
n3:strany
485;490
n3:aktivita
n8:P n8:Z
n3:aktivity
P(GA202/03/0891), P(GA202/05/0410), Z(AV0Z10480505), Z(MSM2672244501)
n3:cisloPeriodika
1/2
n3:dodaniDat
n7:2007
n3:domaciTvurceVysledku
n11:1652834 n11:8841152 n11:2734893
n3:druhVysledku
n4:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
518101
n3:idVysledku
RIV/61389005:_____/05:00042956
n3:jazykVysledku
n15:eng
n3:klicovaSlova
diffusion; lithium; tantalum
n3:klicoveSlovo
n16:lithium n16:diffusion n16:tantalum
n3:kodStatuVydavatele
CH - Švýcarská konfederace
n3:kontrolniKodProRIV
[8CD7BD30F81C]
n3:nazevZdroje
Defect and Diffusion Forum
n3:obor
n13:BM
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:projekt
n14:GA202%2F05%2F0410 n14:GA202%2F03%2F0891
n3:rokUplatneniVysledku
n7:2005
n3:svazekPeriodika
237-240
n3:tvurceVysledku
Pasold, G. Červená, Jarmila Hnatowicz, Vladimír Koster, U. Vacík, Jiří
n3:zamer
n6:MSM2672244501 n6:AV0Z10480505
s:issn
1012-0386
s:numberOfPages
6