Kinetics of titanium nitride synthesized with Ti and N2

Preparation of Ti, Ti/TiC or Ti/TiN based hollow fibres with extremely low electrical resistivity

“…This is the result of the relatively low temperature used for nitridation. [18][19][20] XRD results for the sintered samples Ti-s, Ti/ TiC-s and Ti/TiN-s are provided in the ESI (Fig. S1 †).…”

“…TiN formation from Ti and N 2 by thermal treatment is a method oen reported in literature and will not be discussed in detail. [18][19][20] In order to obtain metallic Ti porous tube electrodes from dry-wet spinning, the polymer needs to be removed. PES has a distinct two-step decomposition in air; the oxygen bonds (ether and sulfone groups) are released below 600 C, whereas the decomposition of the aromatic ring structures is only achieved at temperatures above 600 C. 16 This oxidation behaviour in air, and the decomposition in Ar are shown in Fig.…”

“…We suggest this is related to the limited penetration of nitrogen into the individual Ti particles, due to the relatively mild conditions used in the TiN preparation step. 19,20 The presence of two TiN phases (TiN and Ti 2 N) further implies a disruptive boundary is present, resulting in a rather brittle shell around the Ti core. The bending strength of the Ti/TiN composite can be improved through optimization of the nitridation procedure by increasing the temperature and time of the treatment.…”

“…To further evaluate the effect of a poor conducting shell on the properties of Ti hollow bres, the porous metallic Ti hollow bre was treated in nitrogen atmosphere to create a Ti/TiN composite. [18][19][20] The properties of the resulting bers (Ti, Ti/TiC and Ti/TiN), including porosity, pore size distribution, bending strength and resistivity, are reported for a low (800 C) and high (1100 C) degree of sintering.…”

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).…”