Stability of an amorphous alloy of the Mm-Al-Ni-Cu system

Detalhes bibliográficos
Autor(a) principal: Triveño Rios,Carlos
Data de Publicação: 2012
Outros Autores: Aliaga,Luis César Rodrígues, Kiminami,Claudio Shyinti, Bolfarini,Claudemiro, Botta Filho,Walter José
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=S1516-14392012000500011
Resumo: An investigation was made of the stability of melt-spun ribbons of Mm55Al25Ni10Cu10 (Mm = Mischmetal) amorphous alloy. The structural transformations that occurred during heating were studied using a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Crystallization took place through a multi-stage process. The first stage of transformation corresponded to the formation of a metastable phase followed by cfc-Al precipitation, while in the second stage, exothermic transformations led to the formation of complex and unidentified Mm(Cu, Ni) and MmAl(Cu, Ni) phases. The transformation curves recorded from isothermal treatments at 226 °C and 232 °C indicated that crystallization occurred through nucleation and growth, with diffusion-controlled growth occurring in the first crystallization stage. The supercooled liquid region, ∆Tx, at 40 K/min was ~80 K. This value was obtained by the substitution of Mm (=Ce + La + Nd + Pr) for La or Ce, saving chemical element-related costs.
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spelling Stability of an amorphous alloy of the Mm-Al-Ni-Cu systemmischmetal based glass alloyscrystallizationthermal stabilityAn investigation was made of the stability of melt-spun ribbons of Mm55Al25Ni10Cu10 (Mm = Mischmetal) amorphous alloy. The structural transformations that occurred during heating were studied using a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Crystallization took place through a multi-stage process. The first stage of transformation corresponded to the formation of a metastable phase followed by cfc-Al precipitation, while in the second stage, exothermic transformations led to the formation of complex and unidentified Mm(Cu, Ni) and MmAl(Cu, Ni) phases. The transformation curves recorded from isothermal treatments at 226 °C and 232 °C indicated that crystallization occurred through nucleation and growth, with diffusion-controlled growth occurring in the first crystallization stage. The supercooled liquid region, ∆Tx, at 40 K/min was ~80 K. This value was obtained by the substitution of Mm (=Ce + La + Nd + Pr) for La or Ce, saving chemical element-related costs.ABM, ABC, ABPol2012-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500011Materials Research v.15 n.5 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392012005000106info:eu-repo/semantics/openAccessTriveño Rios,CarlosAliaga,Luis César RodríguesKiminami,Claudio ShyintiBolfarini,ClaudemiroBotta Filho,Walter Joséeng2012-09-18T00:00:00Zoai:scielo:S1516-14392012000500011Revistahttp://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 Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
title Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
spellingShingle Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
Triveño Rios,Carlos
mischmetal based glass alloys
crystallization
thermal stability
title_short Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
title_full Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
title_fullStr Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
title_full_unstemmed Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
title_sort Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
author Triveño Rios,Carlos
author_facet Triveño Rios,Carlos
Aliaga,Luis César Rodrígues
Kiminami,Claudio Shyinti
Bolfarini,Claudemiro
Botta Filho,Walter José
author_role author
author2 Aliaga,Luis César Rodrígues
Kiminami,Claudio Shyinti
Bolfarini,Claudemiro
Botta Filho,Walter José
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Triveño Rios,Carlos
Aliaga,Luis César Rodrígues
Kiminami,Claudio Shyinti
Bolfarini,Claudemiro
Botta Filho,Walter José
dc.subject.por.fl_str_mv mischmetal based glass alloys
crystallization
thermal stability
topic mischmetal based glass alloys
crystallization
thermal stability
description An investigation was made of the stability of melt-spun ribbons of Mm55Al25Ni10Cu10 (Mm = Mischmetal) amorphous alloy. The structural transformations that occurred during heating were studied using a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Crystallization took place through a multi-stage process. The first stage of transformation corresponded to the formation of a metastable phase followed by cfc-Al precipitation, while in the second stage, exothermic transformations led to the formation of complex and unidentified Mm(Cu, Ni) and MmAl(Cu, Ni) phases. The transformation curves recorded from isothermal treatments at 226 °C and 232 °C indicated that crystallization occurred through nucleation and growth, with diffusion-controlled growth occurring in the first crystallization stage. The supercooled liquid region, ∆Tx, at 40 K/min was ~80 K. This value was obtained by the substitution of Mm (=Ce + La + Nd + Pr) for La or Ce, saving chemical element-related costs.
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=S1516-14392012000500011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000500011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392012005000106
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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