Laser weld: microstructure and corrosion study of Ag-Pd-Au-Cu alloy of the dental application

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dc.contributor.authorSantos, M. L.
dc.contributor.authorAcciari, H. A.
dc.contributor.authorVercik, LCO
dc.contributor.authorGuastaldi, Antonio Carlos [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:25:36Z
dc.date.available2014-05-20T15:25:36Z
dc.date.issued2003-04-01
dc.description.abstractThe laser Welding process was introduced into dentistry by the end of the 1980s, resulting on a great impulse to that area with the development of cheaper and smaller equipment, using simpler technique. This allowed greater use of that process on the confection of prostheses compared to the brazing process since the heat source for that process is a concentrated light beam of high power, which minimizes distortion problems on the prosthetic pieces. Ag-Pd-Au-Cu alloy used on the confection of dental implant prostheses was observed before and after subjection to the laser welding process. The microstructure was analyzed with the. use of optic microscopy and the corrosion resistance was studied by the traditional electrochemical techniques and by electrochemical impedance, under environmental conditions simulating the aggressiveness found in the mouth cavity. A structural change was detected on the weld area, which presented a refined microstructure deriving from the high-speed cooling. The base metal out of the weld area presented a fusion coarse microstructure. The electrochemical essays showed differences on the potentiodynamic polarization behavior in both weld and metal base areas, indicating superior corrosion resistance in the weld area. The impedance spectra were characterized by capacitive distorted components, presenting linear impedance in the low frequencies area. (C) 2002 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim Araraquara, BR-14800900 São Paulo, Brazil
dc.description.affiliationUnespUNESP, Inst Quim Araraquara, BR-14800900 São Paulo, Brazil
dc.format.extent1888-1893
dc.identifierhttp://dx.doi.org/10.1016/S0167-577X(02)01095-9
dc.identifier.citationMaterials Letters. Amsterdam: Elsevier B.V., v. 57, n. 13-14, p. 1888-1893, 2003.
dc.identifier.doi10.1016/S0167-577X(02)01095-9
dc.identifier.issn0167-577X
dc.identifier.lattes6443430122330366
dc.identifier.urihttp://hdl.handle.net/11449/35972
dc.identifier.wosWOS:000181880800004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofMaterials Letters
dc.relation.ispartofjcr2.687
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAg-Pd-Au-Cupt
dc.subjectlaserpt
dc.subjectcorrosionpt
dc.subjectdental alloyspt
dc.titleLaser weld: microstructure and corrosion study of Ag-Pd-Au-Cu alloy of the dental applicationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6443430122330366[4]
unesp.author.orcid0000-0002-6433-3555[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ