Microstructures and mechanical properties of in-situ SiC-TiB2 ceramic composites fabricated by reactive melt infiltration

An in situ SiC-TiB2 ceramic composites was fabricated by infiltrating the Al-Si alloy melt into pre-sintered porous preforms with different B4C/TiC weight ratios. The phase composition and microstructure of the SiC-TiB2 ceramic composites were analyzed to understand the synthesis mechanism of the composites. TiB2 and SiC were originated from the reaction among B4C, TiC and Al-Si melt. When the B4C/TiC weight ratio was 35:65, the fabricated...