A novel in-situ preparation technique has been developed for selective reac
tion in solid solution. A thermodynamic approach was employed to analyze th
e selective nitridation conditions of the (Zr,Ti)O-2 solid solution system
and to define the temperature range of the selective nitridation. Tetragona
l zirconia containing titanium nitride powder was synthesized by carbotherm
al reduction under a nitrogen atmosphere in the selected temperature range.
The influence of reaction temperature on selective nitridation was evaluat
ed by X-ray diffraction. Elemental quantitative analysis showed that the ra
tio of selective nitridation of titanium oxide reached about 93%. The morph
ology of the resultant powder was observed by scanning electron microscopy.
The average particle size of the powders obtained was found to be in the r
ange 300-400 nm.