TITLE:
Obtaining at High Pressure the TiN-TiB2 Ceramic Nano-Composite
AUTHORS:
A. Bykov, M. Vlasova, P. A. Márquez Aguilar, M. Kakazey
KEYWORDS:
TiN, TiN-TiB2, Baric Treatment, Substructure, Ceramics
JOURNAL NAME:
Materials Sciences and Applications,
Vol.7 No.5,
May
13,
2016
ABSTRACT: The
process of consolidation of TiN nanopowders under a hydrostatic pressure of 3
GPa was evaluated from the evolution of substructure parameters of compacts
obtained after different exposure of powder bodies under constant pressure at
room temperature. It has been established that in compaction, changes in the
substructure reflect deformation processes of the porous body, which are
accompanied by relaxation processes and the corresponding decrease in
microstresses. The sintering of consolidated 80 wt% TiN - 20 wt% TiB2 powders
at 3 GPa in the temperature range 1300℃ - 1600℃ leads to the substitution of N atoms by B
atoms in TiN and possibly to the substitution of B atoms by N atoms in TiB2.
The presence of oxygen in powders promotes the formation of titanium oxynitride,
which increases the microhardness of specimens.