2.2. The (Si-Tb) system
Experimental results for the phase diagram of the (Si-Tb) system
are shown in figure 8. Bulanova et al. [49] investigated the
phase diagram of the system by analysing alloys of 13 compositions
using DTA, XRD and metallography. The alloys were prepared
from 99.83 wt.% Tb and 99.999 wt.% Si by means of arc-melting
under purified argon atmosphere. Five intermetallic phases
(TbSi2-a, TbSi2-b, TbSi, Tb5Si4 and Tb5Si3) and corresponding invariant
reactions were reported. The homogeneity range of TbSi2-b was