“…It can be seen that all composites could be densified to around 99% of their theory densities after SPS at 1800°C, demonstrating that SPS is a very effective technique to promote the densification of B 4 C ceramics. The sintering temperature for fully dense GNP/B 4 C composites is in good consistence with the sintering temperature for SPSed B 4 C ceramics reported in literature [17,18] and much lower than that of hot-press sintering [19]. Due to the relatively low GNPs concentration, the sinterability of B 4 C was almost not influenced by the addition of GNPs.…”