  In this work, sintered polycrystalline cubic boron nitride (cBN) compacts,
with titanium carbonitride (TiC0.7N0.3) and titanium nitride (TiN),
respectively, as binders, were prepared at temperature of 1450{\deg}C and
pressure of 5.5 GPa during 3 minutes, and the influence of binders on the
plastic deformation of cBN powder due to the sintering process was
experimentally investigated by X-ray diffraction (XRD) analysis. It was shown
that the sintered compact with titanium carbonitride as a binder displays more
intense plastic deformation of cBN grains than that with titanium nitride
binder. This result indicated that if the binders are different, then products
formed during sintering of cBN powders under high pressure and high temperature
(HP-HT) are different so that the stress concentration at the cBN grain
boundaries and a pinning effect, reducing the mobility of the dislocations and
preventing annealing, are different in two cases.
