Detailed kinetics of titanium nitride synthesis

Carbochlorination kinetics of titanium dioxide with carbon and carbon monoxide as reductant

“…Therefore, a much better approximation than simply using the sedimentation particle size is to assume some idealized geometry (sphere in this study) and then to use the actual measured surface area to calculate an effective particle size, R e . [22] This approach also conforms to the suggestions of Szekely et al [23] …”

Kinetics of titanium nitride synthesized with Ti and N2

“…In fact, Ti and N 2 could form to several different stoichiometric ratio compounds, such as Ti 2 N, Ti 5 N 2 and TiN. However, in most previous thermodynamic studies, XRD showed that the final phase compositions are Ti and TiN [2,10]. The Gibbs free energy that varies with temperature was also calculated by Factsage 6.2.…”

“…In 1991, Agrafiotis [9] performed a similar study on the effects of gas pressure and diluent content on the combustion synthesis of TiN, but, the resultant activation energy was 270 kJ/mol, which remarkably differed with the previous reported values. In 1995, Rode and Hlavacek [10] extensively examined the kinetics of TiN synthesis and provided an explanation to this problem. Contrary to previous studies, the experiment was performed in a thermo-gravimetric analyzer (Model ST-736, Harrop Industries, Columbus, OH) which has a range of 20 to 1600°C, with a maximum heating rate of 30°C/min.…”

“…However, the isothermal kinetics method was only applied in Ref. [10]. In addition, most of these reports focused on the combustion propagation phenomenon, conversion degree, and powder morphology.…”

Nitridation enhancement of TiSi2 powders by addition of nickel

“…The conventional synthesis of TiN involves direct nitridation, laser cladding, self propagating high-temperature synthesis and mechanical milling [21,22]. The combustion synthesis of TiN was investigated by several authors and was found relatively easy to proceed [23][24][25][26][27]. M. Ade and J. Hauelt [28] reported that the maximum conversion (90%) of a pure TiSi2 powder with a mean grain size less than 2 µm was obtained for a temperature close to 1400°C, probably because of the formation of liquid silicon (Tmelting(Si)=1414°C).…”