Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology

Detalhes bibliográficos
Autor(a) principal: Sene,Frank Ferrer
Data de Publicação: 2013
Outros Autores: Motta,Cláudio Costa
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=S1516-14392013000200018
Resumo: A brazing process based on Ni-Mo alloy was developed to join porous tungsten cathode bottom and dense molybdenum cathode body for microwave tubes manufacture. The Ni-Mo alloy was obtained by mixing and milling powders in the eutectic composition, and applied on the surface of the components. The brazing was made at 1400 °C by using induction heating in hydrogen for 5 minutes. Alumina surfaces were coated with the binder and analyzed by Energy Dispersive X-rays Fluorescence. The brazed samples were analyzed by Scanning Electron Microscopy coupled to Energy Dispersive Spectroscopy. Stress-strain tests were performed to determine the mechanical behavior of the joining. The quality of the brazing was evaluated by assuring the presence of a "meniscus" formed by the Ni-Mo alloy on the border of the tungsten and molybdenum joint, the absence of microstructural defects in the interface between the tungsten and molybdenum alloys, and the adhesion of the brazed components.
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spelling Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technologyhigh temperature brazinginduction heatingpowder metallurgydecopperizationinterfaceA brazing process based on Ni-Mo alloy was developed to join porous tungsten cathode bottom and dense molybdenum cathode body for microwave tubes manufacture. The Ni-Mo alloy was obtained by mixing and milling powders in the eutectic composition, and applied on the surface of the components. The brazing was made at 1400 °C by using induction heating in hydrogen for 5 minutes. Alumina surfaces were coated with the binder and analyzed by Energy Dispersive X-rays Fluorescence. The brazed samples were analyzed by Scanning Electron Microscopy coupled to Energy Dispersive Spectroscopy. Stress-strain tests were performed to determine the mechanical behavior of the joining. The quality of the brazing was evaluated by assuring the presence of a "meniscus" formed by the Ni-Mo alloy on the border of the tungsten and molybdenum joint, the absence of microstructural defects in the interface between the tungsten and molybdenum alloys, and the adhesion of the brazed components.ABM, ABC, ABPol2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000200018Materials Research v.16 n.2 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000019info:eu-repo/semantics/openAccessSene,Frank FerrerMotta,Cláudio Costaeng2013-03-19T00:00:00Zoai:scielo:S1516-14392013000200018Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-03-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
title Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
spellingShingle Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
Sene,Frank Ferrer
high temperature brazing
induction heating
powder metallurgy
decopperization
interface
title_short Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
title_full Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
title_fullStr Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
title_full_unstemmed Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
title_sort Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology
author Sene,Frank Ferrer
author_facet Sene,Frank Ferrer
Motta,Cláudio Costa
author_role author
author2 Motta,Cláudio Costa
author2_role author
dc.contributor.author.fl_str_mv Sene,Frank Ferrer
Motta,Cláudio Costa
dc.subject.por.fl_str_mv high temperature brazing
induction heating
powder metallurgy
decopperization
interface
topic high temperature brazing
induction heating
powder metallurgy
decopperization
interface
description A brazing process based on Ni-Mo alloy was developed to join porous tungsten cathode bottom and dense molybdenum cathode body for microwave tubes manufacture. The Ni-Mo alloy was obtained by mixing and milling powders in the eutectic composition, and applied on the surface of the components. The brazing was made at 1400 °C by using induction heating in hydrogen for 5 minutes. Alumina surfaces were coated with the binder and analyzed by Energy Dispersive X-rays Fluorescence. The brazed samples were analyzed by Scanning Electron Microscopy coupled to Energy Dispersive Spectroscopy. Stress-strain tests were performed to determine the mechanical behavior of the joining. The quality of the brazing was evaluated by assuring the presence of a "meniscus" formed by the Ni-Mo alloy on the border of the tungsten and molybdenum joint, the absence of microstructural defects in the interface between the tungsten and molybdenum alloys, and the adhesion of the brazed components.
publishDate 2013
dc.date.none.fl_str_mv 2013-04-01
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=S1516-14392013000200018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000200018
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000019
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.2 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_ 1754212662832529408

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