Abstract:
Ti(C, N) powders were synthesized by the hydrolysis precipitation-carbothemal reduction and nitridation method, using TiCl
4 and carbon black as the raw materials. The effects of synthesis technology on the Ti(C, N) powders were characterized by the differential thermal analysis, X-ray diffraction analysis, and scanning electron microscopy. In the results, after baking the precursor powders at 350 ℃ for 2 h, the titanium atoms can only exist in a compound of TiO
2, and a uniformly mixed aggregate of TiO
2 and carbon black forms. The titanium oxide transforms into a complex compound of TiC
xN
yO
z during the carbothermal reduction and nitridation process at 1200~1400 ℃. The nitrogen atoms accelerate the transformation processes from TiO
2 to TiC
xN
yO
z. As the reaction goes on, the oxygen atoms are gradually replaced by carbon and nitrogen atoms to form the solid solution of TiC
xN
y. The Ti(C, N) powders as the chemical formula of TiC
0.547N
0.453 are synthesized at 1530 ℃ for 4 h with the oxygen mass fraction of 0.3% and the powder size of ~300 nm.