Reaction bonded silicon carbide (SiSiC): Moh's hardness is 9.5, with excellent resistance to erosion and corrosion, excellent abrasion-resistance and anti-oxidation. It is 4 to 5 times stronger than nitride bonded silicon carbide. The service life is 7 to 10 times longer than alumina material. The MOR of RBSiC is 5 to 7 times that of SNBSC, it can be used for more complex shapes.