Boron carbide composite ceramic preparation and corrosion behavior in simulated seawater

Abstract B 4 C composite ceramic with different amount of CaB 6 was prepared by hot pressing under 1900 °C, 30Mpa, 1 h. The results showed that the density of B 4 C composite ceramic rose with the increase of CaB 6 amount; hardness rose in value with an increasing of CaB 6 up to 15 wt% and decreased at higher amount. In addition, corrosion behavior of B 4 C composite ceramic in simulated seawater was studied. The maximum quality change rate and maximum corrosion current density in the simulated seawater were 1.31×10 −2 mg·cm -2 ·d −1 and 1.058×10 −5 A/cm 2 , respectively, which showed B 4 C composite ceramic had excellent corrosion resistance in marine environment.