Joining SiC ceramics with silicon resin YR3184

Joints between reaction-bonded silicon carbide (RBSiC) and joints between pressureless sintered silicon carbide (SSiC) were produced respectively using a polysiloxane silicon resin (YR3184, GE Toshiba Silicones) as joining material. Samples were heat treated in a nitrogen flux at temperatures around 1200 °C. The maximum three point bending strength of the joints between reaction-bonded silicon carbide is 197 MPa. The maximum three point bending strength of the joints between sintered silicon carbide is 163 MPa. The join layers are continuous, homogeneous and densified and have thickness of 2–5 μm. The joining mechanism is that the amorphous silicon oxycarbide ceramic pyrolyzed from YR3184 acts as an inorganic adhesive.