Joining the reaction bonded silicon carbide(RB-SiC) by a new-type reaction-formed joint technology which developed from the traditional reaction-formed joint process. Testing the thickness

microstructure

mechanical and thermal properties of the welding line. The test results show that the welding line’s thickness is very thin

during 54-77μm

and its microstructure is similar to the RB-SiC ceramic

so its mechanical property is excellent

the average bending strength of 10 joints is 307MPa. And the welding line didn’t influence the surface figure before and after the temperature of the joining blank changed fast from -10℃ to 65℃ three times.