Síntese de ligas à base de Cu-Ni-Ag de alta condutividade elétrica
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Tipo
Dissertação
Data de publicação
2015-05-22
Periódico
Citações (Scopus)
Autores
Luongo, Leilah Delaretti
Orientador
Carrió, Juan Alfredo Guevara
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Terence, Mauro César
Santos, Denise Ribeiro dos
Santos, Denise Ribeiro dos
Programa
Engenharia de Materiais
Resumo
In this work, samples of copper-silver and silver-copper-nickel alloys were
synthesized by powder metallurgy. The alloys have received sintering and all of them were
characterized metallographically. Different and significant effects were observed in the
microstructure and conductivity of the samples studied. The influence of silver on the
conductivity of the samples with nickel resulted to be lower than the alloy with chromium
and nickel, studied in previous work of the research group, where the same procedures were
applied to the same precursors. An interesting result is that the larger crystallite size favored
the high electrical conductivity, which is presented in the samples without nickel. The
presence of nickel helped to inhibit oxidation and the difference in the amount of nickel
influenced the alloys behavior, however, it did not guarantee high conductivity observed in
the aforementioned alloys copper-nickel-chromium. The structure of the samples was studied
by the Rietveld Method, using data from x-ray diffraction. The differences in microstructure
were investigated by comparing the parameters of the pure copper used as a precursor profile.
Descrição
Palavras-chave
cobre-níquel-prata , metalurgia do pó , microestrutura , condutividade elétrica , silver-copper-nickel , powder metallurgy , microstructure , electrical conductivity
Assuntos Scopus
Citação
LUONGO, Leilah Delaretti. Síntese de ligas à base de Cu-Ni-Ag de alta condutividade elétrica. 2015. 95 f. Dissertação (Mestrado em Engenharia de Materiais) - Universidade Presbiteriana Mackenzie, São Paulo, 2015.