The diffusion of 14C in TiC0.67 was studied at 1745 to 2720C. The diffusivity exhibited a discontinuity at 2080C, which could be represented by:

> 2080C:     D(cm2/s) = 2.85 x 10-4exp[-49600)/RT]

< 2080C:     D(cm2/s) = 1.14 x 102exp[-109900/RT]

No discontinuity was found in C-saturated TiC0.97 and the diffusion here was described, up to 2720C, by:

D(cm2/s) = 6.98 exp[-95300/RT]

S.Sarian: Journal of Applied Physics, 1968, 39[11], 5036-41