Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18

Detalhes bibliográficos
Autor(a) principal: Ribeiro,Rafaella Martins
Data de Publicação: 2012
Outros Autores: Lemus,Luis Fernando, Santos,Dilson Silva dos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500023
Resumo: Samples of amorphous and partially crystallized Fe40Ni38Mo4B18 alloy were submitted to hydrogen gas permeation from 523 to 643 K. The hydrogen permeation curves exhibited a single sigmoidal shape, typical of tests where no hydride formation occurs. It was observed that the hydrogen diffusivity increases for the amorphous samples and partially crystallized alloy with the temperature increase. The hydrogen diffusion coefficient as a function of temperature was found to be D = 5.1 ± 0.5 × 10-12 exp (-11.0 ± 3.5/RT) (m².s-1) for amorphous condition and D = 3.6 ± 0.5 × 10-11 exp (-19.8 ± 3.3/RT) (m².s-1) for the partially crystallized condition. This suggests that the annihilation of defects in the amorphous structure and the crystalline phase precipitate contributes to the increase of the hydrogen diffusion.
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spelling Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18hydrogen diffusionamorphous metallic alloycrystallized alloySamples of amorphous and partially crystallized Fe40Ni38Mo4B18 alloy were submitted to hydrogen gas permeation from 523 to 643 K. The hydrogen permeation curves exhibited a single sigmoidal shape, typical of tests where no hydride formation occurs. It was observed that the hydrogen diffusivity increases for the amorphous samples and partially crystallized alloy with the temperature increase. The hydrogen diffusion coefficient as a function of temperature was found to be D = 5.1 ± 0.5 × 10-12 exp (-11.0 ± 3.5/RT) (m².s-1) for amorphous condition and D = 3.6 ± 0.5 × 10-11 exp (-19.8 ± 3.3/RT) (m².s-1) for the partially crystallized condition. This suggests that the annihilation of defects in the amorphous structure and the crystalline phase precipitate contributes to the increase of the hydrogen diffusion.ABM, ABC, ABPol2012-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500023Materials Research v.15 n.5 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392012005000104info:eu-repo/semantics/openAccessRibeiro,Rafaella MartinsLemus,Luis FernandoSantos,Dilson Silva doseng2012-09-18T00:00:00Zoai:scielo:S1516-14392012000500023Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2012-09-18T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
title Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
spellingShingle Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
Ribeiro,Rafaella Martins
hydrogen diffusion
amorphous metallic alloy
crystallized alloy
title_short Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
title_full Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
title_fullStr Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
title_full_unstemmed Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
title_sort Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18
author Ribeiro,Rafaella Martins
author_facet Ribeiro,Rafaella Martins
Lemus,Luis Fernando
Santos,Dilson Silva dos
author_role author
author2 Lemus,Luis Fernando
Santos,Dilson Silva dos
author2_role author
author
dc.contributor.author.fl_str_mv Ribeiro,Rafaella Martins
Lemus,Luis Fernando
Santos,Dilson Silva dos
dc.subject.por.fl_str_mv hydrogen diffusion
amorphous metallic alloy
crystallized alloy
topic hydrogen diffusion
amorphous metallic alloy
crystallized alloy
description Samples of amorphous and partially crystallized Fe40Ni38Mo4B18 alloy were submitted to hydrogen gas permeation from 523 to 643 K. The hydrogen permeation curves exhibited a single sigmoidal shape, typical of tests where no hydride formation occurs. It was observed that the hydrogen diffusivity increases for the amorphous samples and partially crystallized alloy with the temperature increase. The hydrogen diffusion coefficient as a function of temperature was found to be D = 5.1 ± 0.5 × 10-12 exp (-11.0 ± 3.5/RT) (m².s-1) for amorphous condition and D = 3.6 ± 0.5 × 10-11 exp (-19.8 ± 3.3/RT) (m².s-1) for the partially crystallized condition. This suggests that the annihilation of defects in the amorphous structure and the crystalline phase precipitate contributes to the increase of the hydrogen diffusion.
publishDate 2012
dc.date.none.fl_str_mv 2012-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392012005000104
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.15 n.5 2012
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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