Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
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=S1516-14392013000100009 |
Resumo: | The aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into metastable Ag-rich' and Cu-rich' phases. The constant hardening after apparent initial hardening was the result of a subsequent transformation of the metastable Ag-rich' and Cu-rich' phases to the stable Ag-rich α1phase and AuCu I phase through the metastable AuCu I' phase. During the increase in hardness, fine block-like structure with high coherency formed in the grain interior, which changed to a fine cross-hatched structure. A relatively coarse lamellar structure composed of Ag-rich α1and AuCu I phases grew from the grain boundaries, initiating softening before the grain interior reached its maximum hardness. As a result, the spinodal decomposition attributed to rapid hardening by forming the fine block-like structure, and the subsequent ordering into AuCu I, which is a famous hardening mechanism, weakened its hardening effect by accelerating the lamellar-forming grain boundary reaction. |
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Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloyspinodal decompositionmetastable phaseage-hardeninglamellar-forming grain boundary reactionThe aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into metastable Ag-rich' and Cu-rich' phases. The constant hardening after apparent initial hardening was the result of a subsequent transformation of the metastable Ag-rich' and Cu-rich' phases to the stable Ag-rich α1phase and AuCu I phase through the metastable AuCu I' phase. During the increase in hardness, fine block-like structure with high coherency formed in the grain interior, which changed to a fine cross-hatched structure. A relatively coarse lamellar structure composed of Ag-rich α1and AuCu I phases grew from the grain boundaries, initiating softening before the grain interior reached its maximum hardness. As a result, the spinodal decomposition attributed to rapid hardening by forming the fine block-like structure, and the subsequent ordering into AuCu I, which is a famous hardening mechanism, weakened its hardening effect by accelerating the lamellar-forming grain boundary reaction.ABM, ABC, ABPol2013-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000100009Materials Research v.16 n.1 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392012005000169info:eu-repo/semantics/openAccessKim,Hyung-IlKim,Tae-WanKim,Young-OhCho,Su-YeonLee,Gwang-YoungKwon,Yong HoonSeol,Hyo-Joungeng2013-01-31T00:00:00Zoai:scielo:S1516-14392013000100009Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-01-31T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
title |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
spellingShingle |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy Kim,Hyung-Il spinodal decomposition metastable phase age-hardening lamellar-forming grain boundary reaction |
title_short |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
title_full |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
title_fullStr |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
title_full_unstemmed |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
title_sort |
Age-hardenability and related microstructural changes during and after phase transformation in an Au-Ag-Cu-based dental alloy |
author |
Kim,Hyung-Il |
author_facet |
Kim,Hyung-Il Kim,Tae-Wan Kim,Young-Oh Cho,Su-Yeon Lee,Gwang-Young Kwon,Yong Hoon Seol,Hyo-Joung |
author_role |
author |
author2 |
Kim,Tae-Wan Kim,Young-Oh Cho,Su-Yeon Lee,Gwang-Young Kwon,Yong Hoon Seol,Hyo-Joung |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Kim,Hyung-Il Kim,Tae-Wan Kim,Young-Oh Cho,Su-Yeon Lee,Gwang-Young Kwon,Yong Hoon Seol,Hyo-Joung |
dc.subject.por.fl_str_mv |
spinodal decomposition metastable phase age-hardening lamellar-forming grain boundary reaction |
topic |
spinodal decomposition metastable phase age-hardening lamellar-forming grain boundary reaction |
description |
The aim of this study was to clarify how the microstructural changes during and after phase transformation determine the age-hardenability of an Au-Ag-Cu-based dental alloy. The rapid increase in hardness in the initial stage was the result of rapid atomic diffusion by spinodal decomposition into metastable Ag-rich' and Cu-rich' phases. The constant hardening after apparent initial hardening was the result of a subsequent transformation of the metastable Ag-rich' and Cu-rich' phases to the stable Ag-rich α1phase and AuCu I phase through the metastable AuCu I' phase. During the increase in hardness, fine block-like structure with high coherency formed in the grain interior, which changed to a fine cross-hatched structure. A relatively coarse lamellar structure composed of Ag-rich α1and AuCu I phases grew from the grain boundaries, initiating softening before the grain interior reached its maximum hardness. As a result, the spinodal decomposition attributed to rapid hardening by forming the fine block-like structure, and the subsequent ordering into AuCu I, which is a famous hardening mechanism, weakened its hardening effect by accelerating the lamellar-forming grain boundary reaction. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-02-01 |
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=S1516-14392013000100009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000100009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392012005000169 |
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.16 n.1 2013 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 |
_version_ |
1754212662021980160 |