Ceramics-Silikáty 38, (2) 61 - 67 (1994)

The influence of small amounts (0.2-1.0 wt%) of Cr, Ni, Fe and Ti on the nitridation of pure Si was studied. An accelerating effect of metals on nitriding kinetics became evident above the eutectic temperature of the systems metal - silicon. The time of nitridation of silicon in the presence of a metallic aid was shortened. The initial significant increase of the conversion rate of Si to Si₃N₄ was in the samples with the lowest metal content (0.2 wt%), although the total conversion was greater for the samples with higher metal addition. A slight influence of the type of metal on the phase composition was observed.