Estudo da dependência da condutividade com a microestrutura de ligas Cu-Ni com diferentes dopagens

Página do item simplificado
dc.contributor.advisorCarrió, Juan Alfredo Guevarapt_BR
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/3358090638386343por
dc.contributor.authorAbreu, Claudio Domingos dept_BR
dc.creator.Latteshttp://lattes.cnpq.br/5852228488655875por
dc.date.accessioned2016-03-15T19:37:00Z
dc.date.accessioned2020-05-28T18:07:33Z
dc.date.available2010-08-18pt_BR
dc.date.available2020-05-28T18:07:33Z
dc.date.issued2010-02-09pt_BR
dc.description.abstractCopper and its alloys have various applications from manufactured artefacts to sophisticated equipments and stands out as conductive material due to high electrical and thermal conductivity. Its mechanical properties are moderate, as high corrosion resistance, high ductility. The choice of copper as a study material was motivated by the high consumption, since copper is the third most used metal in the world. Copper can be used alone or combined with other metal and depending on the concentration, can change it is characteristics. In situations where it is required greater mechanical strength, without changing its electrical and thermal properties, one or more elements cam be used in specific concentrations to achieve the desired result. In cast materials increase the percentage of alloying elements can cause a decrease in electrical conductivity. In the process of powder metallurgy the presence of porosity within a structure, indicates inadequate dissolution of the alloy elements, resulting in low electrical conductivity which cam be fixed with thermal treatment. In order to observe the dependence of the conductivity with the microstructure, Cu-Ni alloys were doped with Cr, Al, Sn and Pt. The metallic powder were mixed or and compressed in cold uniaxial pressure of 300 MPa. After that, the samples were sintered at temperatures between 700 and 800 º C for a period of 5400 seconds. The alloys were characterized by optical microscopy, electrical conductivity and Vickers hardness, infrared spectroscopy and x-ray diffraction. The conductivity results already achieved in materials prepared by the casting process and the resulting determined by powder metallurgy, there was a comparative study between these two technologies. It can be observed that the increase in cast materials of alloys and plastic deformation affect the electrical conductivity and powder metallurgy, the less porosity have the final material, the better the results of conductivity.eng
dc.description.sponsorshipFundo Mackenzie de Pesquisapt_BR
dc.formatapplication/pdfpor
dc.identifier.urihttp://dspace.mackenzie.br/handle/10899/24207
dc.languageporpor
dc.publisherUniversidade Presbiteriana Mackenziepor
dc.rightsAcesso Abertopor
dc.subjectligaspor
dc.subjectcobre-niquelpor
dc.subjectmicroestruturapor
dc.subjectresistividadepor
dc.subjectcondutividade elétricapor
dc.subjectalloyeng
dc.subjectcopper-nickeleng
dc.subjectmicrostructureeng
dc.subjectresistivityeng
dc.subjectelectrical conductivityeng
dc.subject.cnpqCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICApor
dc.thumbnail.urlhttp://tede.mackenzie.br/jspui/retrieve/3663/Claudio%20Domingos%20de%20Abreu.pdf.jpg*
dc.titleEstudo da dependência da condutividade com a microestrutura de ligas Cu-Ni com diferentes dopagenspor
dc.typeDissertaçãopor
local.contributor.board1Santos, Denise Ribeiro dospt_BR
local.contributor.board1Latteshttp://lattes.cnpq.br/2042903123178925por
local.contributor.board2Monteiro, Waldemar Alfredopt_BR
local.contributor.board2Latteshttp://lattes.cnpq.br/0247250750660163por
local.publisher.countryBRpor
local.publisher.departmentEngenharia de Materiaispor
local.publisher.initialsUPMpor
local.publisher.programEngenharia de Materiaispor
Arquivos
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Claudio Domingos de Abreu.pdf
Tamanho:
1.66 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Coleções
Engenharia de Materiais - Dissertações - EE Higienópolis