SiCcoatings were successfully prepared onCBparticles after
firing in a binary NaCl–NaF salt at 1100 ◦C for 6 h. NaF was
proven to be essential in the molten saltsynthesis and its optimal
amount was 2.5–5 wt% in the binary NaCl–NaF salt. The SiC
coating thickness, along with the density of SiC coated CB particles,
could be readily tailored by controlling the molar ratio of
Si to CB (Si/C). Compared to uncoated counterparts, SiC coated
CB particlesshowed much improved dispersivity and flowablity
in water, resulting from the existence of more functional groups
on their surfaces. As a result, it could be expected that they
would perform much better than their uncoated counterparts in
real castable systems.