Study on sintering process of Ti2SnC modified copper-graphite composites. (March 2023) - Wei, Hongming
Abstract: Ti2 SnC modified copper-graphite composites were fabricated by spark plasma sintering (SPS) and gas pressure sintering with 40 wt% Cu, 10 wt% graphite, and 50 wt% Ti2 SnC as components. The phase composition, microstructure, and relative density of the composites were analyzed in detail. The results show that Sn atoms diffuse out from Ti2 SnC and into the copper matrix in the composite sample and those fabricated by SPS are stronger than that of gas pressure sintering. The bonding of copper and graphite is favorable, but the pores created by the agglomeration of Ti2 SnC grains are difficult to eliminate by using SPS to fabricate the composites. In contrast, air pressure sintering is beneficial for eliminating the pores caused by the agglomeration of Ti2 SnC grains, but perfect mechanical interlocking between copper and graphite is lacking. Highlights: Ti2 SnC modified copper-graphite composites were prepared with copper-coated graphite, copper and Ti2 SnC. The composites were fabricated by SPS and gas pressure sintering. The composites samples were analyzed by XRD, SEM and EDS.