Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation
Autor(a) principal: | |
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Data de Publicação: | 2017 |
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=S1516-14392017000800905 |
Resumo: | High performance solar collectors are those with high selectivity surfaces, high solar radiation absorption and that do not thermally reemit to the external environment. Strategies to enhance this performance might involve surface porosity modification. In this work, a plasma treatment technique called plasma electrolytic oxidation (PEO) has been tested to produce porosity on aluminium surfaces in a controlled manner. The porosity control was made by varying the intensity, frequency and duty cycle of the applied voltage pulses. The aluminium sample was placed in a solution of 1 g/L Na2SiO3. Voltage of 500 V and current density of 0.17 A cm2 was applied between electrodes. Three duty cycles were used: 33.33%, 50.00% and 67.77%. After treatment, the size, number and distribution of pores were evaluated. These parameters were correlated with both surface reflectance and optical absorbance. It was possible to control the porosity by controlling the electrical parameters of the process. While the mean pore size was directly related to the duty cycle, the inverse occurred for the number of pores. Surface treated with duty cycle of 33.33% presented higher values of absorption for all wavelength range. |
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Obtaining an Optical Trap Type Surface by Plasma Electrolytic OxidationPEOpulsedduty cycleoptical trapHigh performance solar collectors are those with high selectivity surfaces, high solar radiation absorption and that do not thermally reemit to the external environment. Strategies to enhance this performance might involve surface porosity modification. In this work, a plasma treatment technique called plasma electrolytic oxidation (PEO) has been tested to produce porosity on aluminium surfaces in a controlled manner. The porosity control was made by varying the intensity, frequency and duty cycle of the applied voltage pulses. The aluminium sample was placed in a solution of 1 g/L Na2SiO3. Voltage of 500 V and current density of 0.17 A cm2 was applied between electrodes. Three duty cycles were used: 33.33%, 50.00% and 67.77%. After treatment, the size, number and distribution of pores were evaluated. These parameters were correlated with both surface reflectance and optical absorbance. It was possible to control the porosity by controlling the electrical parameters of the process. While the mean pore size was directly related to the duty cycle, the inverse occurred for the number of pores. Surface treated with duty cycle of 33.33% presented higher values of absorption for all wavelength range.ABM, ABC, ABPol2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800905Materials Research v.20 suppl.2 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0624info:eu-repo/semantics/openAccessSilva,Hugo Fernandes Medeiros daToscano,Tarciana DiebGomes,Kelly CristianeSilva Neto,José Felix daCosta,Francine Alves daAlves Junior,Clodomiroeng2018-04-12T00:00:00Zoai:scielo:S1516-14392017000800905Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-04-12T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
title |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
spellingShingle |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation Silva,Hugo Fernandes Medeiros da PEO pulsed duty cycle optical trap |
title_short |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
title_full |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
title_fullStr |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
title_full_unstemmed |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
title_sort |
Obtaining an Optical Trap Type Surface by Plasma Electrolytic Oxidation |
author |
Silva,Hugo Fernandes Medeiros da |
author_facet |
Silva,Hugo Fernandes Medeiros da Toscano,Tarciana Dieb Gomes,Kelly Cristiane Silva Neto,José Felix da Costa,Francine Alves da Alves Junior,Clodomiro |
author_role |
author |
author2 |
Toscano,Tarciana Dieb Gomes,Kelly Cristiane Silva Neto,José Felix da Costa,Francine Alves da Alves Junior,Clodomiro |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silva,Hugo Fernandes Medeiros da Toscano,Tarciana Dieb Gomes,Kelly Cristiane Silva Neto,José Felix da Costa,Francine Alves da Alves Junior,Clodomiro |
dc.subject.por.fl_str_mv |
PEO pulsed duty cycle optical trap |
topic |
PEO pulsed duty cycle optical trap |
description |
High performance solar collectors are those with high selectivity surfaces, high solar radiation absorption and that do not thermally reemit to the external environment. Strategies to enhance this performance might involve surface porosity modification. In this work, a plasma treatment technique called plasma electrolytic oxidation (PEO) has been tested to produce porosity on aluminium surfaces in a controlled manner. The porosity control was made by varying the intensity, frequency and duty cycle of the applied voltage pulses. The aluminium sample was placed in a solution of 1 g/L Na2SiO3. Voltage of 500 V and current density of 0.17 A cm2 was applied between electrodes. Three duty cycles were used: 33.33%, 50.00% and 67.77%. After treatment, the size, number and distribution of pores were evaluated. These parameters were correlated with both surface reflectance and optical absorbance. It was possible to control the porosity by controlling the electrical parameters of the process. While the mean pore size was directly related to the duty cycle, the inverse occurred for the number of pores. Surface treated with duty cycle of 33.33% presented higher values of absorption for all wavelength range. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 |
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=S1516-14392017000800905 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800905 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2017-0624 |
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.20 suppl.2 2017 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_ |
1754212673832091648 |