Performance and characterization of dispersion strengthened Cu–TiB2 composite for electrical use

Vaporization and Poor Wettability as the Main Challenges in Fabrication of TiB2-Cu Cermets Studied by SPS

“…Therefore, search for effective sintering techniques is a fully justified challenge to be undertaken. Such systems were studied and already reported in several papers [3][4][5]9,10,12], including sintering by SPS, and the results were consistently confirmed. Also compaction of Cu or Cu-based powder mixtures by means of SPS technique has been studied at least several times, using different grain size powders and various sintering conditions [2,13,14].…”

“…On the other hand, coarse precipitates that are formed at high temperatures may deteriorate both conductivity and mechanical properties. Therefore, high thermal stability strengthening dispersive, typically refractory oxides, borides or carbides [3,5], are required to extend the lifetime of electrodes or other Cu-matrix composites working at high temperature [2].…”

“…Such metal-like compound also has a very high melting point of 3225 °C [7,8]. The combination of the above-mentioned properties makes TiB2-Cu cermets potentially great candidates for applications where good electrical and/or thermal conductivity is needed [4,5]. For many systems, the fabrication of cermets is impossible, due to thermodynamic aspects.…”

Preparation, electrical contact performance and arc-erosion behavior of Cu/La2NiO4 composites

“…The value for adding La 2 NiO 4 into Cu is higher than that for other incorporations, reported in Ref. [1,6,10,11], whose values are in an approximate range of 11.8-81.9% IACS, though different fabrication conditions such as the variety (e.g., TiB 2 , Y 2 O 3 , ZrC, ZnO, Al 2 O 3 ) and content (e.g., 0.5-6.0 wt.% or 1-2 vol.%) of reinforcements. The continuously distributed Cu matrix acts as a high-performance pathway for electrical conduction, and primarily determines the overall conductivity of the composites; meanwhile, La 2 NiO 4 conductive ceramic reduces the electrical resistance originated from the second phase in conventional cases.…”

Effect of milling conditions on the properties of Cu-NbC alloys obtained by powder metallurgy

“…En las últimas décadas, se han investigado los mecanismos de endurecimiento del cobre mediante la introducción de una segunda fase, que puede ser un cerámico, un metal refractario o un intermetálico [3][4][5][6][7][8][9][10] . El endurecimiento de la matriz de cobre se produce, normalmente, por medio de una dispersión homogé-nea de partículas termodinámicamente estables, de tamaño inferior al micrómetro y de alto punto de fusión, generando así un material compuesto de base cobre.…”