The sintering behaviour of one microcrystalline and several nanocrysta
lline TiN powders was investigated by means of a gas pressure furnace
with an integrated dilatometer. The investigated nanocrystalline powde
rs strongly differ in the sintering activity. It can be concluded from
the experiments, that small grain size, narrow grain size distributio
n and a low oxygen content are the most important prerequisites for hi
gh sintering activity of the nanocrystalline TiN powders. The extraord
inary sintering activity of the best TiN powder makes it possible to p
roduce a dense (< 2% porosity), pure (no sintering aids) and nanostruc
tured (mean diameter of crystals about 100 nm) TiN bodies.