Abstract
SiC fabric layers including Al2O3 or Al2O3–mullite particles were joined to the oxidized dense SiC compact through the SiC/Al2O3 or Al2O3/mullite intermediate layers. The thickness of SiO2 layer formed on the oxidized SiC surfaces is a key factor to control the joining. The laminate of SiC fabric / SiC-Al2O3 sheet or SiC fabric / Al2O3 –mullite sheet showed high damage tolerance to the surface cracks. The fabric layers prevented the propagation of cracks formed. Joining under a low applied pressure (< 2 MPa) was recommended to maintain the high strength of inside SiC compact. Increased pressure during the joining caused the creep rupture of inside dense SiC compact.
