Experimental Determination of Carbon Solubility in Si0.56Cr0.4M0.04 (M= Transition Metal) Solvents for Solution Growth of SiC

摘要

Si_(0.56)Cr_(0.4)M_(0.04) (M= Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Rh, and Pd) solvents were investigated to identify new multi-component materials in which carbon is highly soluble, because solubility is a key parameter in solution growth of SiC. The solubility of carbon in Si0.56Cr0.4Co0.04 was 8.37 at%, the highest value among the tested multi-component materials. This is about 2.5 times the solubility of carbon in Si_(0.6)Cr_(0.4). These results show that addition of a small amount of a transition metal enhanced the solubility of carbon in Si_(0.6)Cr_(0.4). This technique for determining carbon solubility is effective for investigating crystal growth using solvents with several components, for which complex thermodynamic calculations are necessary.