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Published in: Journal of Materials Engineering and Performance 11/2022

25-04-2022 | Technical Article

Mechanical and Thermal Properties of Cu-25wt.%Fe-25wt.%Nb Composite Sintered by Spark Plasma

Authors: L. T. S. Soffner, B. F. de Oliveira, C. S. de Carvalho, M. E. Soffner, M. Filgueira

Published in: Journal of Materials Engineering and Performance | Issue 11/2022

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Abstract

In recent years, the interest with niobium alloys has been increasingly focusing on high-stress applications. This work shows the study of Cu-25wt.%Fe-25 wt.%Nb composite sintered by spark plasma at 700, 750, and 800 °C, under constant uniaxial pressure of 35 MPa for 3 min, evaluated for use as bushings. The scanning electron microscopy results showed regions rich in Nb and α-Fe embedded in a γ-Cu matrix, forming a solid solution of Fe-Nb suggesting the occurrence of a sintering process by Cu liquid phase and precipitation of an ε-phase Fe2Nb Laves. The relative density, mechanical and thermophysical properties were also evaluated. The alloy sintered at 800 °C showed hardness around 81 HB, low porosity, low porosity, yield strength 168 ± 4 MPa, modulus of elasticity 47 ± 4 GPa, and relative density 7.9% higher than the alloy prepared at 700 °C. The values of thermal conductivity obtained were above 70 Wm−1K−1, superior to SAE 65, indicating a possible material for application on bushings.

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Metadata
Title
Mechanical and Thermal Properties of Cu-25wt.%Fe-25wt.%Nb Composite Sintered by Spark Plasma
Authors
L. T. S. Soffner
B. F. de Oliveira
C. S. de Carvalho
M. E. Soffner
M. Filgueira
Publication date
25-04-2022
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 11/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-022-06912-3

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