Effect of Spark Plasma Sintering Temperature on Phase Evaluation and Mechanical Behaviour of cu- 4 Wt% SiC Composite

Abstract

Spark plasma sintering (SPS) is a novel approach to fabricate Cu-SiC composites which have a relatively broad range of potential uses in space applications. The Cu-4wt% SiC composite with homogeneously dispersed SiC particles has been successfully synthesized at various SPS temperatures. In this study, the effect of SPS temperatures on the phase evaluation and mechanical characteristics of the Cu-4wt% SiC composite was investigated. From the results, it was con rmed that the optimum sintering temperature for Cu-4wt% SiC composite is 950 ℃. Raising the spark plasma sintering temperature from 850 ℃ to 950 ℃ led to a higher concentration of copper-liquid phase which accelerates the SiC particle rearrangement and lls the interstitial voids present in the interfaces of matrix and reinforcements which improves the mechanical properties of the Cu-4wt% SiC composite. However, increasing the SPS temperature by more than 950 ℃ prone to the generation of the copper net and inhomogeneous SiC particle dispersion in the copper phases and declines the performance characteristics of the synthesized composite. The Cu-20wt% SiC composite sintered at 950 ℃ exhibits superior mechanical characteristics than the composite sintered at 850 ℃, 900 ℃ and 1000 ℃.

Influence of TiC Particles on Mechanical and Tribological Characteristics of Advanced Aluminium Matrix Composites Fabricated through Ultrasonic-Assisted Stir Casting

“…Reinforcements such as carbides, borides, and oxides have been utilised for both ex situ and in situ composites [12]. The mechanical and surface properties of 8000 series aluminium alloys were enhanced through the incorporation of ceramic particles, such as Al 2 O 3 [13], SiC [14,15], TiO 2 [16], Si 3 N 4 /ZrB 2 [17], B 4 C [18] and TiB 2 [19]. AMCs are presently manufactured using different methods such as mechanical alloying, additive manufacturing [20,21], stir casting [22], compo casting [23], powder metallurgy [24], squeeze casting [25], and spray deposition [26].…”