Journal of the American Ceramic Society, Vol.83, No.7, 1687-1692, 2000
Green state joining of silicon carbide using polycarbosilane
Green state joining of SIC was investigated using a paste consisting of polycarbosilane polymer and SIC powder. The joining process and densification were described, Initial experiments resulted in the formation of symmetrical black bands and cracks on both sides of the joint. However, with modifications in processing conditions, the cracks were eliminated and the resulting joints were indistinguishable from the matrix. The flexural strength of joined samples was measured to be 233 MPa, which was comparable to that of the control sample with similar density. As the applied pressure during joining was increased from 33 to 138 MPa, the strength of the joined samples increased from 180 to 250 MPa.