Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders

Detalhes bibliográficos
Autor(a) principal: Olakanmi,Eyitayo Olatunde
Data de Publicação: 2012
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=S1516-14392012000200001
Resumo: The effect of mixing time on the homogeneity of aluminium powder blends and its SLS processed density and microstructure has been explored with a view to providing a basis for quality control. The degree of mixing of the powder particles was quantified in terms of the standard deviation of the bed density of the blended powder. The accuracy of the degree of mixing of aluminium powder's blends obtained at the optimum blending time of 10 minutes is determined by the powder properties and this significantly influenced the powder's bed density. By increasing the mixing time above 10 minutes, particulate agglomeration which inhibit good packing of powdered particles occurs, thus, sintered density decreases and porosity increases. Therefore, high porosity in the powder bed hinders effective thermal conductivity between aluminium particles, thereby, leading to deterioration of the sintered density and microstructure of the SLS processed samples.
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spelling Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powdersselective laser sintering (SLS)microstructurethermal conductivityagglomerationThe effect of mixing time on the homogeneity of aluminium powder blends and its SLS processed density and microstructure has been explored with a view to providing a basis for quality control. The degree of mixing of the powder particles was quantified in terms of the standard deviation of the bed density of the blended powder. The accuracy of the degree of mixing of aluminium powder's blends obtained at the optimum blending time of 10 minutes is determined by the powder properties and this significantly influenced the powder's bed density. By increasing the mixing time above 10 minutes, particulate agglomeration which inhibit good packing of powdered particles occurs, thus, sintered density decreases and porosity increases. Therefore, high porosity in the powder bed hinders effective thermal conductivity between aluminium particles, thereby, leading to deterioration of the sintered density and microstructure of the SLS processed samples.ABM, ABC, ABPol2012-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200001Materials Research v.15 n.2 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392012005000031info:eu-repo/semantics/openAccessOlakanmi,Eyitayo Olatundeeng2012-05-11T00:00:00Zoai:scielo:S1516-14392012000200001Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2012-05-11T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
title Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
spellingShingle Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
Olakanmi,Eyitayo Olatunde
selective laser sintering (SLS)
microstructure
thermal conductivity
agglomeration
title_short Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
title_full Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
title_fullStr Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
title_full_unstemmed Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
title_sort Effect of mixing time on the bed density, and microstructure of selective laser sintered (sls) aluminium powders
author Olakanmi,Eyitayo Olatunde
author_facet Olakanmi,Eyitayo Olatunde
author_role author
dc.contributor.author.fl_str_mv Olakanmi,Eyitayo Olatunde
dc.subject.por.fl_str_mv selective laser sintering (SLS)
microstructure
thermal conductivity
agglomeration
topic selective laser sintering (SLS)
microstructure
thermal conductivity
agglomeration
description The effect of mixing time on the homogeneity of aluminium powder blends and its SLS processed density and microstructure has been explored with a view to providing a basis for quality control. The degree of mixing of the powder particles was quantified in terms of the standard deviation of the bed density of the blended powder. The accuracy of the degree of mixing of aluminium powder's blends obtained at the optimum blending time of 10 minutes is determined by the powder properties and this significantly influenced the powder's bed density. By increasing the mixing time above 10 minutes, particulate agglomeration which inhibit good packing of powdered particles occurs, thus, sintered density decreases and porosity increases. Therefore, high porosity in the powder bed hinders effective thermal conductivity between aluminium particles, thereby, leading to deterioration of the sintered density and microstructure of the SLS processed samples.
publishDate 2012
dc.date.none.fl_str_mv 2012-04-01
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=S1516-14392012000200001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392012005000031
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.2 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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