Electrical conductivity and microstructural analysis of composite Cu-Ag-Cr-Al2O3 after sintering on powder metallurgy processing
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
The aim of this work was to produce copper-chromium-silver alloys with alumina
by powder metallurgy, forming a composite, keeping good mechanical (hardness
test) and good electrical (electrical conductivity) properties. The elements are
added to copper alloys with purpose to improve mechanical strength, ductility and
thermal stability, without causing considerable damage in its shape, electrical and
thermal conductivity. The metallic powders with alumina have been mixed for an
appropriate time, compressed in uniaxial pressure and sintered at temperatures
of 923K to 1073K in appropriate vacuum. The obtained alloys were characterized
by electrical conductivity, optical microscopy, and Vickers hardness
measurements. The steps performed in composites obtained by powder
metallurgy processing indicate adequate mechanical resistance values (450 MPa)
and, electrical conductivity in the range 0,216 ≤ σ ≤ 0,309 (μΩcm)-1 (35 to 45%
IACS). Electrical conductivity measurements and analysis of microstructures by
optical microscopy suggest that these composites are relevant to the application
as electrical contact material used in consumer electronics devices.
Como referenciar
FONSECA, DANIELA P.M. da; MONTEIRO, WALDEMAR A. Electrical conductivity and microstructural analysis of composite Cu-Ag-Cr-Al2O3 after sintering on powder metallurgy processing. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... São Carlos, SP: Aptor Software, 2016. p. 1107-1107. Disponível em: http://repositorio.ipen.br/handle/123456789/28059. Acesso em: 20 Mar 2026.
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