Abstract
SiC-B4C composites were prepared by arc melting in argon atmosphere using SiC and B4C powders. Uniform lamella texture indicating eutectic reaction was observed at mSiC (SiC molar content)= 0.45 to 0.5. The lowest melting temperature (eutectic temperature) was about 2600K. The lattice parameters of SiC and B4C phases were almost in agreement with those of starting powders. The densities of composites nearly agreed with those calculated from the volume content of each phase. The Seebeck coefficients (α) of SiC-B4C composites increased with increasing temperature in the range between 400 and 1200K. The SiC-B4C composite of mSiC=0.4 (near the eutectic composition) showed the greatest α values (e.g.α=750μV/K at 1050K).
